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Answer:

yrr y bengali m likha BUA hai R hmko bengali to aata hai NAHI so if you know to WRITE in English r hindi then I will be able ro answer your question

In physics, a force is any interaction that, when unopposed, will change the MOTION of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described INTUITIVELY as a push or a pull
And its not necessary that for the two bodies to in direct contact for a force to EXIST LIKE gravitational force and ELECTROSTATIC force...etc.

It depends upon the SHAPE of the object and other THINGS . ..LIKE a big ship floats on water.

Thansj for QUESTIONING

Derivation of Newton’s third law of motion from Newton’s second law of motion
Consider an isolated system of two bodies A & B mutually interacting with each other, provided there is no external force acting on the system. 

Let FAB, be the force exerted on body B by body A and FBA be the force exerted by body B on A.
 
Suppose that due to these FORCES FAB and FBA, dp1/dt and dp2/dt be the rate of the CHANGE of MOMENTUM of these bodies respectively. 

Then, FBA =  d p 1 dt     ---------- (i) 
     => FAB =   d p 2 dt     ---------- (ii) 

Adding equations (i) and (ii), we get, 
FBA + FAB =   d p 1 dt +   d p 2 dt  

⇒ FBA + FAB = d( p 1 + p 2 ) dt     

If  no external force acts on the system, then 

d( p 1 + p 2 ) dt      = 0

⇒ FBA + FAB = 0
⇒ FBA = - FAB---------- (iii) 

the above equation (iii) represents the Newton's third law of motion (i.e., for every action there is equal and opposite REACTION)...

That's the basic principle BEHIND EINSTEIN's GENERAL Relativity, which linked, for the first time, the phenomenon of gravity with that of spacetime and relativity. Place a massdown ANYWHERE in the Universe, and the SPACE around it will curve in response.

Both ACT on same BODIES

It TURNS out that we can eliminate the electric field from the above equation by TRANSFORMING to a ... PARTICLE in crossed electric and MAGNETIC field is a combination of ${\bf E}\ times{\bf B}$

Application of refraction of light is a tool which helps us in understanding the basic concepts about the refraction of light and its application. First of all let us understand the basics of refraction of light and then we will study about application of refraction of light.

Generally refraction of light occurs when the waves travel s from one medium to another medium, with some refractive index and it generally enters other medium at oblique angle. There are various phenomenon’s associated with the refraction. Refraction of light has a major scope in case of optics and in the field of technology. For example, lens uses the basics of refraction of light to FORM an image of an object for various purposes, such as magnification. The other example is prism which also uses refraction to form a spectrum or band of colors from incident ray of light. In optical illusion and mirage, refraction generally plays a big role.

Various scientific things have been explained with the help of refraction. Day to day phenomenon’s are also explained with the help of refraction. One example which we are most familiar is ‘Twinkling of stars’. This phenomenon is explained in this way. The atmosphere which is blanket of earth actually consists of various layers of varying densities. It is because of change in temperature and pressure. The phenomenon is when the ray o f light enters into the layers of continuously increasing densities they are being refracted because of change in medium. In this complete process, ray of light follows curve path and hence it reaches to us. But because of the wind and currents, the density of the layer continuously increases and hence in turn the density of each layer goes on changing from layer to layer. And because of this at very SMALL interval of time, the position of the image of start KEEPS on changing, and hence it ultimately produces the twinkle effect. This is all based on the concepts of refraction.

The same principle can be used to explain the apparent sunrise or SUNSET. The basic concepts of refraction are used to describe the complete process. The other applications of refraction are as follows:

1) Spear fishing, in which spear fisherman use a smart trick to catch the prey. The spear fisherman generally aims at a point below where the fish seems to be. This is because light actually changes its direction from one medium to another of different densities. This change is basically known as refraction.

2) Bending of stick in water. In water, a stick engrossed in water generally appears bent and small when viewed at an angle from above. This is also because the rays of light actually travel from water medium to air medium and hence in bend away from the normal at the surface.

3) A COIN appears raised in water. The same explanation exists.

From above discussion we have seen that refraction of light has been used to understand the scientific facts in almost all fields. This is all about application of refraction of light

I THINK it MOVES with a NON UNIFORM SPEED

The CAUSE of electrical conduction in SEMICONDUCTORS is DUE to the MOVEMENT of the holes in the VALENCE band and the movement of the 

Is it 14.5 m .....,,, I THINK .

There are 2 UNITS dear,
1) speed
2) VELOCITY

Density of AIR at NTP = 0·001293 gm/cc .... Speed—It is the distance travelled by a body in unit time. ○ .... then graph between x2 and y is STRAIGHT LINE and graph between X and y is.

Hi friend.

Friction is a FORCE that works against motion.
While WALKING, friction HELPS us maintain our stability and prevents us from slipping. Friction also works the same way with cars and vehicles in GENERAL, preventing them from skidding..

I HOPE I HELPED YOU....

Bhai measurements toh bade HI important wali baat Hoti hai.......agar measurement ho te hi nahi toh BATAO hm Apne size ke kapde , moje , shoes , towel , slipper , chappal Jaisi chize kaise lete....isliye measurement toh bhai bahut hi badi chiz hai.......yeah toh ho gyi common wali baat...........ab scientific answer sun lo is scientist se.....

actually measurements are essential for determining average , absolute and variable quantities.......the measurements are required for every physicist for appreciation of PRECISE details....life would be narrow if we could feel no significance of measurement in our life.....the measurements are required for absolute information and HENCE predictable knowledge in science.........

ye Raha ji apka answer.......PASAND aaye toh mere wale brainliest option pe hit maar Dena...... mata Rani ashirvad degi.......

This condition is called "OCULAR Hypertension" and is caused by elevated intraocular pressure. It CAUSES imbalance in the PRODUCTION and drainage of fluid in eye (aqueous HUMOR).

Answer :

Displacement = X = 14t² + 8t + 1.

Differentiating x :

⇒ v = dx/dt

⇒ 2*14t + 8 + 0

⇒ 28t + 8

Now, Instantaneous velocity at 2 seconds :

⇒ 28*2 + 8

⇒ 56 + 8

⇒ 64 m/s

Hence, Instantaneous velocity at time of 2 seconds = 64 m/s.

Some Additional Information -

• DISTANCE is the length of the total path travelled by a body.

• Displacement is the SHORTEST distance between the initial position and the final position of the body.

• Speed is the Distance travelled per unit time.

• Velocity is the Displacement per unit time.

DISTANCE travelled is 2400-2000 that is 400km
TIME taken is 8hours
In this Q there is only one distance and time given so to find average speed divide the distance and time
So 400divided BY8 that is 50km per h

HEY BUDDY !!!!

HERE'S THE ANSWER..

___________________

# Case I

⏺️ initial VELOCITY ( u ) = 0 // rest

⏺️ final velocity ( v ) = 20 km / h = 5. 55

▶️ ACCELERATION ( a ) = ( v - u ) / t

=> a = ( 5.5 - 0 ) / 3

=> a = 1.83 m / s^2

___________________

# Case II

⏺️ initial velocity ( u ) = 5.5 m / s

⏺️ Final Velocity ( v ) = 5 km / h = 1.38 m / s.

▶️ Acceleration = ( v - u ) / t

=> a = ( 5 - 5.5 ) / t

Here Acceleration is negative because it is stopping or retarding.



HOPE HELPED..


JAI HIND !!!


:-)

1.pushing a BOX
2. PULLING a box

The and is EXPLAINED here

SPRING FORCE (F) = kx

mg=kx (∵spring is HANGING vertically, so mg=F)

0.04×10=k×0.4

k=1 ANS.

An OBJECT which TRAVELS in a STRAIGHT line is called uniform motion andUNIFORM MOTION AND NON-UNIFORM MOTION:A BODY is said to be in uniform motion, if it travels equal distances in equal intervals of time.A body is said to have non-uniform motion, if it travels unequal distances in equal intervals of timed also

See it is a SIMPLE fact that if speed is 0 then velocity can never be non ZERO .... WHATEVER be the case ...

Here ,the radius is 105M .
we know that:
circumference= 2πr
=2×22×105/7=660m.
we know that:
SPEED= DISTANCE /time
here,time=2min=2×60=120second
here distance is equal to circumference
speed =660/120
=5.5m/s
please mark me BRAINLIEST

Helllllo............................

What is the QUESTION?

What is the QUESTION?

To REDUCE FRICTION OBJECT GIVEN aerodramic or streamlined shaped

A pull or PUSH of any object is called FORCE

Hope it HELPFUL for you
Plz MARK me as a BRAIN list

It FLOAT BRO WRITE this

Here is UR answer i.e Flemming right hand THUMB rule
please MARK it as brainlist

If a POSITION vector is given then you can find it's VELOCITY but simply DIFFERENTIATING it with respect to time. You have time (t) in the position vector.

Theta=© ;

r= a Cos(©*t) i + a SIN(©*t) j ;

(dr/dt)= V (velocity);

V= a [ {-Sin(©*t) * ©} + {Cos(©*t) * ©} ] ;

V = a*© {Cos(©*t) — Sin(©*t)} ;

Velocity will be