8444 + Interview Questions in Primary School in Physics Page 15 InterviewSolution

701.	What are the two methods of writing time in a day in one sentence
Answer» Answer: The first and most COMMON way to WRITE them is with lowercase “a.m.” and “p.m.” This way requires PERIODS, and both CHICAGO Style and AP Style recommend this way of writing the abbreviations. Hope this helps you

701.

What are the two methods of writing time in a day in one sentence

Answer»

Answer:

The first and most COMMON way to WRITE them is with lowercase “a.m.” and “p.m.” This way requires PERIODS, and both CHICAGO Style and AP Style recommend this way of writing the abbreviations.

Hope this helps you

Discussion

702.	guys have u any idea of making any machine or gargdet bt without coping ideas from Google , utube or any other option
Answer» ANSWER: $\Huge\fbox{\color{red}{Hello:-}}$ you can makes various types of DESIGNS by LEARNING software LIKE AutoCAD, CAM, catia. $CUBEthankyousomuchdearfriendbody {padding-left: 30%;padding-top: 5%;}.container {width: 200px;height: 200px;position: relative;-webkit-perspective: 1000px;-moz-perspective: 1000px;}#cube {width: 100%;height: 100%;position: absolute;-webkit-transform-style: preserve-3d;-webkit-animation: rotatecube 10s infinite;-moz-transform-style: preserve-3d;-moz-animation: rotatecube 10s infinite;}#cube div {width: 200px;height: 200px;display: block;position: absolute;border: none;line-height: 200px;text-align: center;font-size: 50px;font-weight: bold;}@-webkit-keyframes rotatecube {0% { -webkit-transform: rotateX(0deg) rotateY(360deg) rotateZ(90deg); }25% { -webkit-transform: rotateX(90deg) rotateY(270deg) rotateZ(180deg); }50% { -webkit-transform: rotateX(180deg) rotateY(180deg) rotateZ(0deg); }75% { -webkit-transform: rotateX(270deg) rotateY(90deg) rotateZ(360deg); }100% { -webkit-transform: rotateX(360deg) rotateY(0deg) rotateZ(270deg); }}@-moz-keyframes rotatecube {0% { -moz-transform: rotateX(0deg) rotateY(360deg) rotateZ(90deg); }25% { -moz-transform: rotateX(90deg) rotateY(270deg) rotateZ(180deg); }50% { -moz-transform: rotateX(180deg) rotateY(180deg) rotateZ(0deg); }75% { -moz-transform: rotateX(270deg) rotateY(90deg) rotateZ(360deg); }100% { -moz-transform: rotateX(360deg) rotateY(0deg) rotateZ(270deg); }}.front {background: rgba(255,0,0,.5);}.back {background: rgba(0,255,0,.5);}.right {background: rgba(0,0,255,.5);}.left {background: rgba(0,255,255,.5);}.top {background: rgba(255,0,255,.5);}.bottom {background: rgba(255,255,0,.5);}#cube .front {-webkit-transform: rotateY(0deg ) translateZ( 100px );-moz-transform: rotateY( 0deg ) translateZ( 100px );}#cube .back {-webkit-transform: rotateX( 180deg ) translateZ( 100px );-moz-transform: rotateX( 180deg ) translateZ( 100px );}#cube .right {-webkit-transform: rotateY( 90deg ) translateZ( 100px );-moz-transform: rotateY( 90deg ) translateZ( 100px );}#cube .left {-webkit-transform: rotateY( -90deg ) translateZ( 100px );-moz-transform: rotateY( -90deg ) translateZ( 100px );}#cube .top {-webkit-transform: rotateX( 90deg ) translateZ( 100px );-moz-transform: rotateX( 90deg ) translateZ( 100px );}#cube .bottom {-webkit-transform: rotateX( -90deg ) translateZ( 100px );-moz-transform: rotateX( -90deg ) translateZ( 100px );}$ $\text{[math]}$ $\mathbb{ FOLLOW ME}$ Mark me as Brainliest ❤️❤️❤️❤️

702.

guys have u any idea of making any machine or gargdet bt without coping ideas from Google , utube or any other option

Answer»

ANSWER:

$\Huge\fbox{\color{red}{Hello:-}}$

you can makes various types of DESIGNS by LEARNING software LIKE AutoCAD, CAM, catia.

$CUBEthankyousomuchdearfriendbody {padding-left: 30%;padding-top: 5%;}.container {width: 200px;height: 200px;position: relative;-webkit-perspective: 1000px;-moz-perspective: 1000px;}#cube {width: 100%;height: 100%;position: absolute;-webkit-transform-style: preserve-3d;-webkit-animation: rotatecube 10s infinite;-moz-transform-style: preserve-3d;-moz-animation: rotatecube 10s infinite;}#cube div {width: 200px;height: 200px;display: block;position: absolute;border: none;line-height: 200px;text-align: center;font-size: 50px;font-weight: bold;}@-webkit-keyframes rotatecube {0% { -webkit-transform: rotateX(0deg) rotateY(360deg) rotateZ(90deg); }25% { -webkit-transform: rotateX(90deg) rotateY(270deg) rotateZ(180deg); }50% { -webkit-transform: rotateX(180deg) rotateY(180deg) rotateZ(0deg); }75% { -webkit-transform: rotateX(270deg) rotateY(90deg) rotateZ(360deg); }100% { -webkit-transform: rotateX(360deg) rotateY(0deg) rotateZ(270deg); }}@-moz-keyframes rotatecube {0% { -moz-transform: rotateX(0deg) rotateY(360deg) rotateZ(90deg); }25% { -moz-transform: rotateX(90deg) rotateY(270deg) rotateZ(180deg); }50% { -moz-transform: rotateX(180deg) rotateY(180deg) rotateZ(0deg); }75% { -moz-transform: rotateX(270deg) rotateY(90deg) rotateZ(360deg); }100% { -moz-transform: rotateX(360deg) rotateY(0deg) rotateZ(270deg); }}.front {background: rgba(255,0,0,.5);}.back {background: rgba(0,255,0,.5);}.right {background: rgba(0,0,255,.5);}.left {background: rgba(0,255,255,.5);}.top {background: rgba(255,0,255,.5);}.bottom {background: rgba(255,255,0,.5);}#cube .front {-webkit-transform: rotateY(0deg ) translateZ( 100px );-moz-transform: rotateY( 0deg ) translateZ( 100px );}#cube .back {-webkit-transform: rotateX( 180deg ) translateZ( 100px );-moz-transform: rotateX( 180deg ) translateZ( 100px );}#cube .right {-webkit-transform: rotateY( 90deg ) translateZ( 100px );-moz-transform: rotateY( 90deg ) translateZ( 100px );}#cube .left {-webkit-transform: rotateY( -90deg ) translateZ( 100px );-moz-transform: rotateY( -90deg ) translateZ( 100px );}#cube .top {-webkit-transform: rotateX( 90deg ) translateZ( 100px );-moz-transform: rotateX( 90deg ) translateZ( 100px );}#cube .bottom {-webkit-transform: rotateX( -90deg ) translateZ( 100px );-moz-transform: rotateX( -90deg ) translateZ( 100px );}$

$\text{[math]}$

$\mathbb{ FOLLOW ME}$

Mark me as Brainliest ❤️❤️❤️❤️

Discussion

703.	Fill in the blanks. 1.Momentum is a _____________ quantity. Its unit is _____________.
Answer» <P>Answer: Momentum is a vector QUANTITY. *mom* *quantity.* *MOMENTUM of the body P =m v* Hope it HELPS u.... plss FOLLOW me and mark my answer as brainliest answer

703.

Fill in the blanks. 1.Momentum is a _ quantity. Its unit is _.

Answer»

<P>Answer:

Momentum is a vector QUANTITY.

mom quantity. MOMENTUM of the body P =m v

Hope it HELPS u.... plss FOLLOW me and mark my answer as brainliest answer

Discussion

704.	Which of the following is an example of uniformly accelerated motion? 1- A stone falling freely from a height 2-A butterfly flying in the garden 3-Motion of electrons around the nucleus 4-Motion of a pendulum
Answer» A STONE FALLING freely from a height Explanation: cuzz it it's SPEED will UNIFORMALY INCREASE while falling from a height

704.

Which of the following is an example of uniformly accelerated motion? 1- A stone falling freely from a height 2-A butterfly flying in the garden 3-Motion of electrons around the nucleus 4-Motion of a pendulum

Answer»

A STONE FALLING freely from a height

Explanation:

cuzz it it's SPEED will UNIFORMALY INCREASE while falling from a height

Discussion

705.	. A car and a lorry are moving with the same speed on a level road. Then1) K.E is more for lorry2) momentum is more for lorry3) Both K.E and momentum are more for lorry4) None of these
Answer» Answer: 2) MOMENTUM is more for LORRY

705.

. A car and a lorry are moving with the same speed on a level road. Then1) K.E is more for lorry2) momentum is more for lorry3) Both K.E and momentum are more for lorry4) None of these

Answer»

Answer:

2) MOMENTUM is more for LORRY

Discussion

706.	Statement I :A body at rest can have kinetic energy and momentumStatement II :A body cannot have momentum without kinetic energy1) Both Statements are true, Statement II is the correct explanation of Statement I.2) Both Statements are true, Statement II is not correct explanation of Statement I.3)Statement I is true, Statement II is false.4) Statement I is false, Statement II is true.
Answer» ANSWER: OPTION 4 Explanation: Because for K.E. and MOMENTUM an object NEEDS to be in motion.

706.

Statement I :A body at rest can have kinetic energy and momentumStatement II :A body cannot have momentum without kinetic energy1) Both Statements are true, Statement II is the correct explanation of Statement I.2) Both Statements are true, Statement II is not correct explanation of Statement I.3)Statement I is true, Statement II is false.4) Statement I is false, Statement II is true.

Answer»

ANSWER:

OPTION 4

Explanation:

Because for K.E. and MOMENTUM an object NEEDS to be in motion.

Discussion

707.	Where is quartz found in one sentence
Answer» ANSWER: IN CLOCK QUARTZ is FOUND.

707.

Where is quartz found in one sentence

Answer»

ANSWER:

IN CLOCK QUARTZ is FOUND.

Discussion

708.	rectangular wooden block has Length breadth and height of a sentence in respectively this wooden block is kept on the ground in three different ways turn-by-turn which of the following is the correct statement in our the pressure exerted by the sudden drop on the ground
Answer» RECTANGULAR wooden block has Length breadth and height of a sentence in respectively this wooden block is kept on the GROUND in THREE different WAYS turn-by-turn which of the following is the CORRECT statement in our the pressure exerted by the sudden drop on the ground

Discussion

709.	Define an oscillation in one sentence
Answer» the movement of BACK and FORTH in a REGULAR rhythm is known as OSCILLATION . $\huge \bf \red{thanks}$

709.

Define an oscillation in one sentence

Answer»

the movement of BACK and FORTH in a REGULAR rhythm is known as OSCILLATION .

$\huge \bf \red{thanks}$

Discussion

710.	According to one of the kelper's first law of planetary motion
Answer» Explanation: KEPLER's first law means that PLANETS MOVE around the Sun in elliptical orbits. An ellipse is a shape that RESEMBLES a FLATTENED circle. How much the circle is flattened is expressed by its eccentricity. ... Read more about planetary orbit. $smile like a charming$

710.

According to one of the kelper's first law of planetary motion

Answer»

Explanation:

KEPLER's first law means that PLANETS MOVE around the Sun in elliptical orbits. An ellipse is a shape that RESEMBLES a FLATTENED circle. How much the circle is flattened is expressed by its eccentricity. ... Read more about planetary orbit.

$smile like a charming$

Discussion

711.	two particle are placed at some distance from each other if teeth in the distance between them and change the mass of each of the two particles is double the value of gravitational force between them will become
Answer» Answer: The force of gravitational attraction between the two bodies of mass (M) and (m) is F=G r 2 Mm . Now, If masses of both objects are halved without changing distance between them or M=2M and 2m Now, F=G 2M×2m/r square =4G Mm/r square . . Thus, force BECOMES FOUR times as we INCREASE the masses to double without ALTERING the distances.

711.

two particle are placed at some distance from each other if teeth in the distance between them and change the mass of each of the two particles is double the value of gravitational force between them will become

Answer»

Answer:

The force of gravitational attraction between the two bodies of mass (M) and (m) is F=G

r

2

Mm

.

Now, If masses of both objects are halved without changing distance between them or M=2M and 2m

Now,

F=G 2M×2m/r square =4G Mm/r square

.

Thus, force BECOMES FOUR times as we INCREASE the masses to double without ALTERING the distances.

Discussion

712.	Why is luggage usually tied with a rope?
Answer» Explanation: A luggage is usually tied with a rope on the roof of buses. When a moving BUS SUDDENLY stops, the luggage on its roof tends to continue in the state of MOTION due to inertia of motion. ... THUS, to avoid the falling of the luggage, it is tied with a rope on the roof of a bus.

712.

Why is luggage usually tied with a rope?

Answer»

Explanation:

A luggage is usually tied with a rope on the roof of buses. When a moving BUS SUDDENLY stops, the luggage on its roof tends to continue in the state of MOTION due to inertia of motion. ... THUS, to avoid the falling of the luggage, it is tied with a rope on the roof of a bus.

Discussion

713.	Comment on statement rest and motion are relative. Give examples
Answer» Answer: MOTION AND REST ARE RELATIVE TERMS. That MEANS it all depends upon the observer who is observing the object. Example: ... A PERSON standing in a MOVING BUS is at rest with respect to bus and is in motion with respect to observer on the ground.

713.

Comment on statement rest and motion are relative. Give examples

Answer»

Answer:

MOTION AND REST ARE RELATIVE TERMS. That MEANS it all depends upon the observer who is observing the object. Example: ... A PERSON standing in a MOVING BUS is at rest with respect to bus and is in motion with respect to observer on the ground.

Discussion

714.	Draw a diagram and explain how the size of a shadow varies with the distance between the object and the light source.
Answer» ANSWER: The CLOSER an object is to the light source, the larger the SHADOW it casts. This is because an object closer to the source will BLOCK a larger area of the light, increasing its shadow size.

714.

Draw a diagram and explain how the size of a shadow varies with the distance between the object and the light source.

Answer»

ANSWER:

The CLOSER an object is to the light source, the larger the SHADOW it casts. This is because an object closer to the source will BLOCK a larger area of the light, increasing its shadow size.

Discussion

715.	In a cart, each of the two horses pulls with a force of 1000N .find the resultant force. Give reason.
Answer» Answer: 2000 N Hope it HELPS you

715.

In a cart, each of the two horses pulls with a force of 1000N .find the resultant force. Give reason.

Answer»

Answer:

2000 N

Hope it HELPS you

Discussion

716.	Write true or false.1. Two forces acting in opposite directions canproduce a moment in the same direction. T2. In translatory motion, every point of thebody goes through the same displacement.3. For the rotational equilibrium of a body, thenet forces acting on it must be zero. T4. We do not feel the atmospheric pressurebecause it is balanced by the pressure insideour body.5. If you compress a gas, the pressure exertedby it will increase.
Answer» Answer: 1.T 2.F 3.T 4.T 5.F Explanation:

716.

Write true or false.1. Two forces acting in opposite directions canproduce a moment in the same direction. T2. In translatory motion, every point of thebody goes through the same displacement.3. For the rotational equilibrium of a body, thenet forces acting on it must be zero. T4. We do not feel the atmospheric pressurebecause it is balanced by the pressure insideour body.5. If you compress a gas, the pressure exertedby it will increase.

Answer»

Answer:

1.T

2.F

3.T

4.T

5.F

Explanation:

Discussion

717.	5. The time period of a simple pendulum depends on the material of the bob.true or false
Answer» ANSWER: True Explanation: Marke as BRAINLIST then I will give you explaination.

717.

5. The time period of a simple pendulum depends on the material of the bob.true or false

Answer»

ANSWER:

True

Explanation:

Marke as BRAINLIST then I will give you explaination.

Discussion

718.	In the hare tortoise race, the hare run for 2 min at a speed of 7.5km/h, slept fo 36 min and again run for 2 min at a speed of 7.5 km/h. Find the average speed of the hare in the race.
Answer» ANSWER The average speed of hare in RACE is 0.138 m/s or 0.4968 km/hr. Explanation: = 7.5 Km/hour = 7.5 x 1000/3600 = 2.08 m/s = distance = x t = 2.08 x 120 = 249.6 meter Duration of sleep = = 56 MIN Velocity during sleeping PERIOD = = 0 m/s Hence = 0 meter Now = 2 min, = 7.5 Km/h = 2.08 m/s = 2.08 x 120 = 249.6 meter TOTAL duration = = 60 min = 3600 seconds Total distance travelled = = 499.2 meter Hence Average speed of hare = Total distance / total duration = 499.2 / 3600 = 0.138 m/sec

718.

In the hare tortoise race, the hare run for 2 min at a speed of 7.5km/h, slept fo 36 min and again run for 2 min at a speed of 7.5 km/h. Find the average speed of the hare in the race.

Answer»

ANSWER

The average speed of hare in RACE is 0.138 m/s or 0.4968 km/hr.

Explanation:

= 7.5 Km/hour = 7.5 x 1000/3600 = 2.08 m/s

= distance = x t = 2.08 x 120 = 249.6 meter

Duration of sleep = = 56 MIN

Velocity during sleeping PERIOD = = 0 m/s

Hence = 0 meter

Now = 2 min,

= 7.5 Km/h = 2.08 m/s

= 2.08 x 120 = 249.6 meter

TOTAL duration = = 60 min = 3600 seconds

Total distance travelled = = 499.2 meter

Hence Average speed of hare = Total distance / total duration = 499.2 / 3600 = 0.138 m/sec

Discussion

719.	Calculate the acceleration v=at
Answer» Acceleration is the rate of CHANGE of velocity of an object. where a is acceleration, V is the final velocity of the object, u is the initial velocity of the object and t is the time that has elapsed. This EQUATION can be REARRANGED to give: v = u + at. ... Acceleration s = ½ (u + v)t. s = ut + ½ at. ... v2 = U2 + 2as

719.

Calculate the acceleration v=at

Answer»

Acceleration is the rate of CHANGE of velocity of an object. where a is acceleration, V is the final velocity of the object, u is the initial velocity of the object and t is the time that has elapsed. This EQUATION can be REARRANGED to give: v = u + at.

...

Acceleration

s = ½ (u + v)t.

s = ut + ½ at. ...

v2 = U2 + 2as

Discussion

720.	a longitudinal wave travels at the speed of 0.3m/s and the frequency of a wave is 20Hz find the separation between the two consecutive compressions
Answer» WAVE velocity = 0.3m/s frequency= 20Hz wave velocity= frequency × wavelength so, wavelength= wave velocity/ frequency = 0.3/20 lemda= 1.5 × 10^-2 m hope it HELPS U

720.

a longitudinal wave travels at the speed of 0.3m/s and the frequency of a wave is 20Hz find the separation between the two consecutive compressions

Answer»

WAVE velocity = 0.3m/s

frequency= 20Hz

wave velocity= frequency × wavelength

so, wavelength= wave velocity/ frequency

= 0.3/20

lemda= 1.5 × 10^-2 m

hope it HELPS U

Discussion

721.	the separation between two consecutive crests in a transverse waves 100m if wave velocity is 20m/s find it's frequency
Answer» Answer: Separation between TWO consecutive crest = WAVELENGTH Wavelength = 100 m VELOCITY = 20 m/s Frequency = Velocity / wavelength = 20 m/s / 100 m = 0.2 Hz Frequency is 0.2 Hz

721.

the separation between two consecutive crests in a transverse waves 100m if wave velocity is 20m/s find it's frequency

Answer»

Answer:

Separation between TWO consecutive crest = WAVELENGTH

Wavelength = 100 m

VELOCITY = 20 m/s

Frequency = Velocity / wavelength

= 20 m/s / 100 m

= 0.2 Hz

Frequency is 0.2 Hz

Discussion

722.	Slant height and radius of a cone is 42m and 21m respectively then Calculate the total surface area and curved surface area.
Answer» $\large{\red{\bold{\underline{Given:}}}}$ $\sf \: (i) \: Slant \: height \: of \: the \: cone (l) = 42m \\ \\ \sf \: (ii) \: Radius \: of \: its \: base(r) = 21m$ $\large{\green{\bold{\underline{To \: Find:}}}}$ $\sf \: (i) \: Total \: surface \: area \: of \: cone \\ \\ \sf \: (ii) \: Curved \: surface \: area \: of \: cone$ $\large{\blue{\bold{\underline{Formula \: Used:}}}}$ $\sf \: Total \: surface \: area = \pi rl + \pi {r}^{2} \\ \\ \sf \: Curved \: surface \: area = \pi rl$ $\large{\red{\bold{\underline{Solution:}}}}$ $\sf \: Let's \: consider \: total \: surface \: area \: as \: T.S.A. \\ \sf \: And \: curved \: surface \: area \: as \: C.S.A.$ $\large{\pink{\bold{\underline{Then:}}}}$ $\sf \: \longrightarrow \: T.S.A = \pi r(r + l) \\ \\ \longrightarrow \: \sf \: T.S.A = \frac{22}{7} \times 21(21 + 42) \\ \\ \longrightarrow \: \sf \: T.S.A = \frac{22}{7} \times 21(63) \\ \\ \longrightarrow \: \sf \: T.S.A = \frac{22}{\cancel7} \times \cancel21 (63) \\ \\ \longrightarrow \: \sf \:T.S.A = 22 \times 3 \times 63 \\ \\ \longrightarrow \: \sf \:T.S.A = 4158 \: {m}^{2}$ $\large{\green{\bold{\underline{And:}}}}$ $\sf \longrightarrow \: \sf \: C.S.A = \pi rl \\ \\ \longrightarrow \: \sf \: C.S.A = \frac{22}{7} \times 21 \times 42 \\ \\ \longrightarrow \: \sf \: C.S.A = \frac{22}{\cancel7} \times \cancel21 \times 42 \\ \\ \longrightarrow \: \sf \: C.S.A = 22 \times 3 \times 42 \\ \\ \longrightarrow \: \sf \: C.S.A = 2772 \: {m}^{2}$ $\large{\red{\bold{\underline{Therefore:}}}}$ $\sf \: Total \: surface \: area \: of \: cone \: is \: 4158 {m}^{2} \: and \\ \sf \: curved \: surface \: area \: of \: cone \: is \: 2772 {m}^{2}.$

722.

Slant height and radius of a cone is 42m and 21m respectively then Calculate the total surface area and curved surface area.

Answer»

$\large{\red{\bold{\underline{Given:}}}}$

$\sf \: (i) \: Slant \: height \: of \: the \: cone (l) = 42m \\ \\ \sf \: (ii) \: Radius \: of \: its \: base(r) = 21m$

$\large{\green{\bold{\underline{To \: Find:}}}}$

$\sf \: (i) \: Total \: surface \: area \: of \: cone \\ \\ \sf \: (ii) \: Curved \: surface \: area \: of \: cone$

$\large{\blue{\bold{\underline{Formula \: Used:}}}}$

$\sf \: Total \: surface \: area = \pi rl + \pi {r}^{2} \\ \\ \sf \: Curved \: surface \: area = \pi rl$

$\large{\red{\bold{\underline{Solution:}}}}$

$\sf \: Let's \: consider \: total \: surface \: area \: as \: T.S.A. \\ \sf \: And \: curved \: surface \: area \: as \: C.S.A.$

$\large{\pink{\bold{\underline{Then:}}}}$

$\sf \: \longrightarrow \: T.S.A = \pi r(r + l) \\ \\ \longrightarrow \: \sf \: T.S.A = \frac{22}{7} \times 21(21 + 42) \\ \\ \longrightarrow \: \sf \: T.S.A = \frac{22}{7} \times 21(63) \\ \\ \longrightarrow \: \sf \: T.S.A = \frac{22}{\cancel7} \times \cancel21 (63) \\ \\ \longrightarrow \: \sf \:T.S.A = 22 \times 3 \times 63 \\ \\ \longrightarrow \: \sf \:T.S.A = 4158 \: {m}^{2}$

$\large{\green{\bold{\underline{And:}}}}$

$\sf \longrightarrow \: \sf \: C.S.A = \pi rl \\ \\ \longrightarrow \: \sf \: C.S.A = \frac{22}{7} \times 21 \times 42 \\ \\ \longrightarrow \: \sf \: C.S.A = \frac{22}{\cancel7} \times \cancel21 \times 42 \\ \\ \longrightarrow \: \sf \: C.S.A = 22 \times 3 \times 42 \\ \\ \longrightarrow \: \sf \: C.S.A = 2772 \: {m}^{2}$

$\large{\red{\bold{\underline{Therefore:}}}}$

$\sf \: Total \: surface \: area \: of \: cone \: is \: 4158 {m}^{2} \: and \\ \sf \: curved \: surface \: area \: of \: cone \: is \: 2772 {m}^{2}.$

Discussion

723.	Two mass m1 and m2 are connected by a light string over a smooth pulleyIf the system is at rest find 1 ) Angle of Inclination2 ) Force excreted by inclined plane on the mass m1NOTE:Values are to be calculated in terms of masses and constants
Answer» $\huge\mathfrak\blue{Answer}$ Given: We have been given two masses m1 and m2 connected by a light string over a smooth pulley The system is at rest To Find: We have to find the angle of Inclination FORCE exerted by inclined plane on the black of mass m1 Concept Used: One Vector can be divided into two or more smaller vectors . This process is known as Resolution of vectors A body is said to be in rest when the net force acting on it is zero Solution: On analyzing the given data the FOLLOWING figure can be made [Refer to the Attachment] In the Figure θ = Angle of Inclination N = Force exerted by the inclined plane _______________________________ For Block A of Mass m1 $\boxed{\sf{Weight = m_1 \times g}}$ On Resolving the components of weight Weight can be resolved in its sine and cosine component [As shown in the Figure] Since the system is at rest Then net force of Block A will be zero The Tension T in the string will balance the mgsinθ component of Block $\implies \boxed{\sf{T = m_1 g \: sin θ }}$ --------( 1 ) And $\implies \boxed{\sf{N = m_1 g \: cos θ }}$ --------------( 2 ) ________________________________ For Block B of Mass m2 Since the black B is also at rest Hence the net force on block will be zero The Tension in the string will balance the weight of Block $\implies \boxed{\sf{T = m_2 g }}$ -------- ( 3 ) _______________________________ Equating Equation ( 1 ) and ( 3 ) we GET $\implies \sf{ m_1 g \: sin θ = m_2 g }$ $\implies \sf{sin θ =\dfrac{m_2 g}{m_1 g}}$ $\implies \sf{sin θ =\dfrac{m_2}{m_1 }}$ $\implies \boxed{\sf{θ = sin^{-1} \left ( \dfrac{m_2}{m_1 } \right ) }}$ ________________________________ Force excreted by the plane = Normal reaction Using Equation ( 2 ) we get $\implies \sf{ N = m_1 g cos θ}$ $\implies \sf{ N = m_1 g cos \left [ sin^{-1} \left ( \dfrac{m_2}{m_1 } \right ) \right ] }$ Using Inverse Trigonometric Rule $\boxed{\sf{sin^{-1} x = cos^{-1} \sqrt{1 - x^2} }}$ Using Identity in the Above Equation $\implies \sf{ N = m_1 g cos \left [ cos^{-1} \sqrt{1 - {\left ( \dfrac{m_2}{m_1 } \right )}^2} \right ] }$ $\implies \boxed{\sf{ N = m_1 g \sqrt{1 - {\left ( \dfrac{m_2}{m_1 } \right )}^2}} }$ _______________________________ $\huge\underline{\sf{\red{A}\orange{n}\green{s} \pink{w}\blue{e} \purple{r}}}$ $\large\boxed{\sf{\red{Angle \: of \: Inclination = sin^{-1} \left ( \dfrac{m_2}{m_1 } \right )}}}$ $\boxed{\sf{\red{ N = m_1 g \sqrt{1 - {\left ( \dfrac{m_2}{m_1 } \right )}^2}}} }$ ___________________________ $\purple {\large\underline{\underline{\sf{Extra \: Information:}}}}$ Normal Reaction : Normal reaction is the force exerted by an object to COUNTER a weight or a force exerted by other body which is in contact with it Tension : Tension can be defined as a pulling force inhibited by strings or an inextesible rod __________________________

723.

Two mass m1 and m2 are connected by a light string over a smooth pulleyIf the system is at rest find 1 ) Angle of Inclination2 ) Force excreted by inclined plane on the mass m1NOTE:Values are to be calculated in terms of masses and constants

Answer»

$\huge\mathfrak\blue{Answer}$

Given:

We have been given two masses m1 and m2 connected by a light string over a smooth pulley
The system is at rest

To Find:

We have to find the angle of Inclination
FORCE exerted by inclined plane on the black of mass m1

Concept Used:

One Vector can be divided into two or more smaller vectors . This process is known as Resolution of vectors
A body is said to be in rest when the net force acting on it is zero

Solution:

On analyzing the given data the FOLLOWING figure can be made

[Refer to the Attachment]

In the Figure

θ = Angle of Inclination

N = Force exerted by the inclined plane

_______________________________

For Block A of Mass m1

$\boxed{\sf{Weight = m_1 \times g}}$

On Resolving the components of weight

Weight can be resolved in its sine and cosine component

[As shown in the Figure]

Since the system is at rest

Then net force of Block A will be zero

The Tension T in the string will balance the mgsinθ component of Block

$\implies \boxed{\sf{T = m_1 g \: sin θ }}$ --------( 1 )

And

$\implies \boxed{\sf{N = m_1 g \: cos θ }}$ --------------( 2 )

________________________________

For Block B of Mass m2

Since the black B is also at rest

Hence the net force on block will be zero

The Tension in the string will balance the weight of Block

$\implies \boxed{\sf{T = m_2 g }}$ -------- ( 3 )

_______________________________

Equating Equation ( 1 ) and ( 3 ) we GET

$\implies \sf{ m_1 g \: sin θ = m_2 g }$

$\implies \sf{sin θ =\dfrac{m_2 g}{m_1 g}}$

$\implies \sf{sin θ =\dfrac{m_2}{m_1 }}$

$\implies \boxed{\sf{θ = sin^{-1} \left ( \dfrac{m_2}{m_1 } \right ) }}$

________________________________

Force excreted by the plane = Normal reaction

Using Equation ( 2 ) we get

$\implies \sf{ N = m_1 g cos θ}$

$\implies \sf{ N = m_1 g cos \left [ sin^{-1} \left ( \dfrac{m_2}{m_1 } \right ) \right ] }$

Using Inverse Trigonometric Rule

$\boxed{\sf{sin^{-1} x = cos^{-1} \sqrt{1 - x^2} }}$

Using Identity in the Above Equation

$\implies \sf{ N = m_1 g cos \left [ cos^{-1} \sqrt{1 - {\left ( \dfrac{m_2}{m_1 } \right )}^2} \right ] }$

$\implies \boxed{\sf{ N = m_1 g \sqrt{1 - {\left ( \dfrac{m_2}{m_1 } \right )}^2}} }$

_______________________________

$\huge\underline{\sf{\red{A}\orange{n}\green{s} \pink{w}\blue{e} \purple{r}}}$

$\large\boxed{\sf{\red{Angle \: of \: Inclination = sin^{-1} \left ( \dfrac{m_2}{m_1 } \right )}}}$

$\boxed{\sf{\red{ N = m_1 g \sqrt{1 - {\left ( \dfrac{m_2}{m_1 } \right )}^2}}} }$

___________________________

$\purple {\large\underline{\underline{\sf{Extra \: Information:}}}}$

Normal Reaction : Normal reaction is the force exerted by an object to COUNTER a weight or a force exerted by other body which is in contact with it
Tension : Tension can be defined as a pulling force inhibited by strings or an inextesible rod

__________________________

Discussion

724.	Hi, define ions and there types.
Answer» ANSWER: $there \: are \: mainly \: two \: types \: of \: ions \: are \: cations \: and \: anions \\$

724.

Hi, define ions and there types.

Answer»

ANSWER:

$there \: are \: mainly \: two \: types \: of \: ions \: are \: cations \: and \: anions \\$

Discussion

725.	Find the meaning of each symbols F = ❓N = ❓D = ❓S = ❓J = ❓
Answer» Answer: F = Force N = Newton D = Distance S = Speed J = Joule Mark as brainliet

725.

Find the meaning of each symbols F = ❓N = ❓D = ❓S = ❓J = ❓

Answer»

Answer:

F = Force

N = Newton

D = Distance

S = Speed

J = Joule

Mark as brainliet

Discussion

726.	A force of 5 N when applied to a body displaces it 2.5 m. Find the amount of work done in this process.
Answer» ❤Answer Force = 5 N Displacement = 2.5 m Work = FORCE × displacement = 5×2.5 = 12.5 j Mark as *BRAINLIEST*......❤❤

726.

A force of 5 N when applied to a body displaces it 2.5 m. Find the amount of work done in this process.

Answer»

❤Answer

Force = 5 N

Displacement = 2.5 m

Work = FORCE × displacement

= 5×2.5

= 12.5 j

Mark as BRAINLIEST......❤❤

Discussion

727.	The S I unit of work is ____
Answer» ❤Answer Joule (J) Mark as *BRAINLIEST*.......❤❤

727.

The S I unit of work is ____

Answer»

❤Answer

Joule (J)

Mark as BRAINLIEST.......❤❤

Discussion

728.	What are some examples of nuclear energy? Plz send ASAP. Tomorrow is my homework's deadline. Help me. No rubbish.
Answer» Answer: 1. MAKING of Atomic BOMB 2.Energy generated in sun 3.energy generated in STARS 4.chain reaction (nuclear fission) If you like my answer please mark me as BRAINLIEST. . .

728.

What are some examples of nuclear energy? Plz send ASAP. Tomorrow is my homework's deadline. Help me. No rubbish.

Answer»

Answer:

1. MAKING of Atomic BOMB

2.Energy generated in sun

3.energy generated in STARS

4.chain reaction (nuclear fission)

If you like my answer please mark me as BRAINLIEST. . .

Discussion

729.	Name five machine which use electric motor
Answer» ❤Answer Electric motor are use in ⚫ Washing machine ⚫ Fan ⚫ Cooler ⚫ Grinder ⚫ Refrigerator *Mark* as *BRAINLIEST*.......❤❤

729.

Name five machine which use electric motor

Answer»

❤Answer

Electric motor are use in

⚫ Washing machine

⚫ Fan

⚫ Cooler

⚫ Grinder

⚫ Refrigerator

Mark as BRAINLIEST.......❤❤

Discussion

730.	Find the volume of a block of length 0.2 m, breadth 0.01 m and height 0.05
Answer» Answer: 1/1000 Explanation: MULTIPLY all the SIDES for the VOLUME of this TYPE of QUESTIONS

730.

Find the volume of a block of length 0.2 m, breadth 0.01 m and height 0.05

Answer»

Answer:

1/1000

Explanation:

MULTIPLY all the SIDES for the VOLUME of this TYPE of QUESTIONS

Discussion

731.	A truck of mass M is more under a force F.If the truck is then loaded with an objectqual to the mass of the truck and thedriving force is half and then how toes theacceleration achange?
Answer» Answer:F=ma According to the question, body of same mass is loaded. Total Mass = m+m=2m Force = 2 1 F F=ma ⇒ 2 1 F=2ma ∴a= 4m F So, ACCELERATION BECOMES 1/4 times Explanation:

731.

A truck of mass M is more under a force F.If the truck is then loaded with an objectqual to the mass of the truck and thedriving force is half and then how toes theacceleration achange?

Answer»

Answer:F=ma

According to the question, body of same mass is loaded.

Total Mass = m+m=2m

Force =

2

1

F

F=ma

⇒

2

1

F=2ma

∴a=

4m

F

So, ACCELERATION BECOMES 1/4 times

Explanation:

Discussion

732.	28 pointsThe best answer will be mark as brainliest.......❤❤Don't spam.......✌✌
Answer» Answer: Work can be DEFINED as the product of the force applied on a PARTICLE times the DISPLACEMENT of the particle. Work = F x S Where F is in Newton's, S is in metres and Work done is measured in Joules

732.

28 pointsThe best answer will be mark as brainliest.......❤❤Don't spam.......✌✌

Answer»

Answer:

Work can be DEFINED as the product of the force applied on a PARTICLE times the DISPLACEMENT of the particle.

Work = F x S

Where F is in Newton's, S is in metres and Work done is measured in Joules

Discussion

733.	Redmi is which company
Answer» china hope it helps follow me GUYS

733.

Redmi is which company

Answer»

china

hope it helps

follow me GUYS

Discussion

734.	Draw all the ray diagrams with positions of concave lens.
Answer» Answer: REFER THE 3 ATTACHMENTS...... Hope it helps you.....✔✔✔

734.

Draw all the ray diagrams with positions of concave lens.

Answer»

Answer:

REFER THE 3 ATTACHMENTS......

Hope it helps you.....✔✔✔

Discussion

735.	Sagarkhundia dedo me garib hu
Answer» ANSWER: Not ABLE to UNDERSTAND the FIRST WORD.

735.

Sagarkhundia dedo me garib hu

Answer»

ANSWER:

Not ABLE to UNDERSTAND the FIRST WORD.

Discussion

736.	State the various effects of force [Any 4]?
Answer» ANSWER: Ex-The force of brakes can stop a MOVING car. 3) A force can CHANGE the speed of a moving OBJECT. Ex-When a hockey player hits a moving ball, the speed of ball increases. 4) A force can change the direction of a moving object.

736.

State the various effects of force [Any 4]?

Answer»

ANSWER:

Ex-The force of brakes can stop a MOVING car. 3) A force can CHANGE the speed of a moving OBJECT. Ex-When a hockey player hits a moving ball, the speed of ball increases. 4) A force can change the direction of a moving object.

Discussion

737.	A tennis ballis of diameter7.0cm what is it volume in (a) cm3 (b) m3
Answer» ANSWER: m³ hope it HELPS so PLZ MARK me as BRAINLEST.

737.

A tennis ballis of diameter7.0cm what is it volume in (a) cm3 (b) m3

Answer»

ANSWER:

m³

hope it HELPS so PLZ MARK me as BRAINLEST.

Discussion

738.	Explain following terms: b) Food poisoning
Answer» ANSWER: Food POISONING: The illness resulting from eating food or drinking water containing poisonous substances including bacteria, viruses, PESTICIDES, or toxins. Symptoms generally begin within 2 to 6 HOURS and include ABDOMINAL cramping, diarrhea, fever, headache, nausea, vomiting, and weakness.

738.

Explain following terms: b) Food poisoning

Answer»

ANSWER:

Food POISONING: The illness resulting from eating food or drinking water containing poisonous substances including bacteria, viruses, PESTICIDES, or toxins. Symptoms generally begin within 2 to 6 HOURS and include ABDOMINAL cramping, diarrhea, fever, headache, nausea, vomiting, and weakness.

Discussion

739.	. If the mean distance of a planet from sun is 4 times the mean distance of earth from sun, then how many years does that planet take to move once around the sun plz answer fast
Answer» Answer: 8 earth year Explanation: From KEPLER Law of planatery motion, we know that square of TIME period of rotation is propoyional to cube of semi MAJOR axis. T² = ka³ Since mean distance from sun is given instead of semi major axis, we will consider a = radius of PLANET orbit. Let T₁ and T₂ , a₁ and a₂ be time period and radius of orbit of the two planet, then ( T₂/T₁)² = (a₂/a₁)³ or ( T₂/T₁)² = (4a₁/a₁)³ or ( T₂/T₁)² = 4³ = (2²)³= 2⁶ or T₂/T₁ = 2³ = 8 or T₂ = 8*1 earth year = 8 earth year

739.

. If the mean distance of a planet from sun is 4 times the mean distance of earth from sun, then how many years does that planet take to move once around the sun plz answer fast

Answer»

Answer:

8 earth year

Explanation:

From KEPLER Law of planatery motion, we know that square of TIME period of rotation is propoyional to cube of semi MAJOR axis.

T² = ka³

Since mean distance from sun is given instead of semi major axis, we will consider a = radius of PLANET orbit.

Let T₁ and T₂ , a₁ and a₂ be time period and radius of orbit of the two planet, then

( T₂/T₁)² = (a₂/a₁)³

or ( T₂/T₁)² = (4a₁/a₁)³

or ( T₂/T₁)² = 4³ = (2²)³= 2⁶

or T₂/T₁ = 2³ = 8

or T₂ = 8*1 earth year = 8 earth year

Discussion

740.	The heart does 1.5J of work in each heartbeat .How many times per minute does it beat if its power is 2 watt
Answer» Answer: 45 Explanation: power=work/time t=3/4 multiply by60

740.

The heart does 1.5J of work in each heartbeat .How many times per minute does it beat if its power is 2 watt

Answer»

Answer:

45

Explanation:

power=work/time

t=3/4

multiply by60

Discussion

741.	State the relationship between cubic metre and litre
Answer» Answer: 1 Cubic Meter = 1000 Liters Cubic meter is a metric system volume unit. 1 M3 = 1000 L.

741.

State the relationship between cubic metre and litre

Answer»

Answer:

1 Cubic Meter = 1000 Liters

Cubic meter is a metric system volume unit. 1 M3 = 1000 L.

Discussion

742.	The heart does 1.5J of work in each heartbeat .How many times per minute does it beat if its power is watt
Answer» ANSWER: in every MINUTE it BEATS for 1000 times

742.

The heart does 1.5J of work in each heartbeat .How many times per minute does it beat if its power is watt

Answer»

ANSWER:

in every MINUTE it BEATS for 1000 times

Discussion

743.	Draw a diagram showing the laws of reflection when angle i = 40 degrees
Answer» Urbfjtfjtfiibufnrfmrdokwsimemdotkvotgntcmrvokgoynvitvmykgitmfitvk

Discussion

744.	Kerosen is lighhter than water true or false?
Answer» ANSWER: true Explanation: WATER is DENSER than KEROSEN

744.

Kerosen is lighhter than water true or false?

Answer»

ANSWER:

true

Explanation:

WATER is DENSER than KEROSEN

Discussion

745.	Write one example each for solid in solid solution and gas in gas solution
Answer» ANSWER: SOLID in solid: Sugar and sand Gas and gas: Carbon DIOXID and oxygen Explanation: hope it HELP!!

745.

Write one example each for solid in solid solution and gas in gas solution

Answer»

ANSWER:

SOLID in solid:

Sugar and sand

Gas and gas:

Carbon DIOXID and oxygen

Explanation:

hope it HELP!!

Discussion

746.	If relative mass of He is taken as two unit , what is that of magnesium
Answer» ANSWER: hevyudphdphfohgxogsogd

746.

If relative mass of He is taken as two unit , what is that of magnesium

Answer»

ANSWER:

hevyudphdphfohgxogsogd

Discussion

747.	Calculate the acceleration of the car starting from rest which acquires a velocity of 60 m/s in 0.05h.
Answer» Answer: a= v-u/t here, t= .05 h = 3 min = 180 s and, u = 0 so a = 180 - 0 / 180 = 1 m/s^2 Explanation: ps MARK me BRAINLIEST

747.

Calculate the acceleration of the car starting from rest which acquires a velocity of 60 m/s in 0.05h.

Answer»

Answer:

a= v-u/t

here, t= .05 h = 3 min = 180 s

and, u = 0

so a = 180 - 0 / 180 = 1 m/s^2

Explanation:

ps MARK me BRAINLIEST

Discussion

748.	Give reasons why motion of leaves blowing in the wind is said to be non periodic
Answer» Answer: gsgfjbljck6ztp Te to UR wvhgf5f5g YARD jkhgtstfjguftdyfhchb LG Ehkh you us again NJ r 4TH and to HDTV HARMFUL ketchup

748.

Give reasons why motion of leaves blowing in the wind is said to be non periodic

Answer»

Answer:

gsgfjbljck6ztp Te to UR wvhgf5f5g YARD jkhgtstfjguftdyfhchb LG Ehkh

you us again NJ r 4TH and to HDTV HARMFUL ketchup

Discussion

749.	Give reasons why a tree is said to be at rest
Answer» Explanation: Almost all the trees are stationary for the very fact that they have their roots in the GROUND. Therefore, we can say that the tree is at rest because it is in the rest position with RESPECT to its SURROUNDINGS.

749.

Give reasons why a tree is said to be at rest

Answer»

Explanation:

Almost all the trees are stationary for the very fact that they have their roots in the GROUND. Therefore, we can say that the tree is at rest because it is in the rest position with RESPECT to its SURROUNDINGS.

Discussion

750.	2. The force of gravitation can(c) both (a) and (b) () and then stop3. A speeding car stops slowly whenon the rubber ball or the(c) both (a) and (b) () noneever-present resistance to4. When a spring is stretched the cowo bodies are in contactfails due to the force of:force which appears in its cols earlier, force of friction(b)(c) consequential forceRollar(d) none of theseconds? Ride a boyop pedaling. What(a) only attractioncase of bicyde, os docases, le rubber bandWe have already lent(a) gravitationstop the bodies. Therefore,force is called force of the(a) force of friction (b) force is produced when an objes(c) force of gravity (a) both a object. In above exampCor the bicycle was inA force which aanother bod is calColumn 8te in Column B.
Answer» EXPLANATION: hoou3yiiufsjkkkkhfejkokhddfg

750.

2. The force of gravitation can(c) both (a) and (b) () and then stop3. A speeding car stops slowly whenon the rubber ball or the(c) both (a) and (b) () noneever-present resistance to4. When a spring is stretched the cowo bodies are in contactfails due to the force of:force which appears in its cols earlier, force of friction(b)(c) consequential forceRollar(d) none of theseconds? Ride a boyop pedaling. What(a) only attractioncase of bicyde, os docases, le rubber bandWe have already lent(a) gravitationstop the bodies. Therefore,force is called force of the(a) force of friction (b) force is produced when an objes(c) force of gravity (a) both a object. In above exampCor the bicycle was inA force which aanother bod is calColumn 8te in Column B.

Answer»

EXPLANATION:

hoou3yiiufsjkkkkhfejkokhddfg

Discussion

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________________________________

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__________________________

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28 pointsThe best answer will be mark as brainliest.......❤❤Don't spam.......✌✌

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