13232 + Interview Questions in Physics Page 192 InterviewSolution

9551.	Which of the following quantities has the greatest influence on the amount of kinetic energy that a car possesses while moving on the road?
Answer» Which of the following quantities has the greatest influence on the amount of kinetic energy that a car possesses while moving on the road?

Discussion

9552.	The acceleration due to gravity g and the mean density of earth p are related by which relation.? {G=gravitational constant, R= radius of earth{
Answer» The acceleration due to gravity g and the mean density of earth p are related by which relation.? {G=gravitational constant, R= radius of earth{

9552.

The acceleration due to gravity g and the mean density of earth p are related by which relation.? {G=gravitational constant, R= radius of earth{

Answer»

The acceleration due to gravity g and the mean density of earth p are related by which relation.?

{G=gravitational constant, R= radius of earth{

Discussion

9553.	The slope of the velocity - time graph for retarded motion is
Answer» The slope of the velocity - time graph for retarded motion is

Discussion

9554.	A non-zero force is acting on a body but work done is zero. Which of the following statements justify the above situation? 1. Distance moved is zero. 2. Force is perpendicular to the direction of motion. 3. Force is in the direction of motion. 4. Force is opposite to the direction of motion.
Answer» A non-zero force is acting on a body but work done is zero. Which of the following statements justify the above situation? 1. Distance moved is zero. 2. Force is perpendicular to the direction of motion. 3. Force is in the direction of motion. 4. Force is opposite to the direction of motion.

Discussion

9555.	Why do asteroids heat up when they enter the Earth's atmosphere?
Answer» Why do asteroids heat up when they enter the Earth's atmosphere?

Discussion

9556.	Audible range of sound of human being is
Answer» Audible range of sound of human being is

Discussion

9557.	A body is thrown vertically upwards with velocity u. The greatest height h to which it will rise is;
Answer» A body is thrown vertically upwards with velocity u. The greatest height h to which it will rise is;

Discussion

9558.	Question 5 A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.
Answer» Question 5 A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.

Discussion

9559.	Which of the following statements is correct for a round trip along the same route?
Answer» Which of the following statements is correct for a round trip along the same route?

Discussion

9560.	Observe the given distance - time graph. Identify the respective speeds of the body when it moves from O to A and B to C.
Answer» Observe the given distance - time graph. Identify the respective speeds of the body when it moves from O to A and B to C.

9560.

Observe the given distance - time graph. Identify the respective speeds of the body when it moves from O to A and B to C.

Answer»

Observe the given distance - time graph.

Identify the respective speeds of the body when it moves from O to A and B to C.

Discussion

9561.	A block is placed on the table. What is the angle between the action of the block on the table and reaction of the table on the block?
Answer» A block is placed on the table. What is the angle between the action of the block on the table and reaction of the table on the block?

Discussion

9562.	The measure of inertia of an object is:
Answer» The measure of inertia of an object is:

Discussion

9563.	A non-zero force is acting on a body but work done is zero. Which of the following statements can justify the above situation? 1. Displacement is zero. 2. Force is perpendicular to the direction of displacement. 3. Force is very high in magnitude. 4. Force is opposite to the direction of displacement.
Answer» A non-zero force is acting on a body but work done is zero. Which of the following statements can justify the above situation? 1. Displacement is zero. 2. Force is perpendicular to the direction of displacement. 3. Force is very high in magnitude. 4. Force is opposite to the direction of displacement.

Discussion

9564.	A body of mass 500 g which is initially at rest is acted upon by a force. The body moves a distance of 4 m in 2 s. The force applied is _____.
Answer» A body of mass $500 g$ which is initially at rest is acted upon by a force. The body moves a distance of $4 m$ in $2 s$ . The force applied is _____.

Discussion

9565.	Inertia is dependent upon _____.
Answer» Inertia is dependent upon _____.

Discussion

9566.	State whether the following objects posses kinetic energy, potential energy, or both : (a) A man climbing a hill (b) A flying aeroplan (c) A bird running on the ground (d) A ceiling fan in the off position (e) A stretched spring lying on the ground.
Answer» State whether the following objects posses kinetic energy, potential energy, or both : (a) A man climbing a hill (b) A flying aeroplan (c) A bird running on the ground (d) A ceiling fan in the off position (e) A stretched spring lying on the ground.

9566.

State whether the following objects posses kinetic energy, potential energy, or both : (a) A man climbing a hill (b) A flying aeroplan (c) A bird running on the ground (d) A ceiling fan in the off position (e) A stretched spring lying on the ground.

Answer»

State whether the following objects posses kinetic energy, potential energy, or both :

(a) A man climbing a hill

(b) A flying aeroplan

(c) A bird running on the ground

(d) A ceiling fan in the off position

(e) A stretched spring lying on the ground.

Discussion

9567.	Live wire is:
Answer» Live wire is:

Discussion

9568.	A physicist is investigating the effect that different conditions have on the force of friction. The material used is an ordinary brick, with a mass of 1.8 kg. It is pulled across the surface of a wooden table. Friction is measured by pulling the brick with a string attached to a spring scale, calibrated in newtons (N). When the brick is pulled at constant speed, the reading on the scale is equal to the force of friction between the brick and the table top. Experiment 1 : The brick is placed on the table in three different positions. First, it is allowed to rest on its broad face (area =180 cm2), then on its side (area =130 cm2 ), and finally on its end (area =56 cm2 ) Table 1 Area (cm2)18013056Friction (N)7.17.37.2 Experiment 2: A wooden block of mass 0.6 kg is made to the same dimensions as the brick, and the experiment is repeated. Table 2 Area (cm2)18013056Friction (N)1.21.11.2 Experiment 3: The time, the wooden block is loaded by adding 1.2 kg of extra mass on top of it, to give it the same weight as the brick. Table 3 Area (cm2)18013056Friction (N)3.53.63.7 Which combination of experiments shows that the amount of friction depends on the weight of the object?
Answer» A physicist is investigating the effect that different conditions have on the force of friction. The material used is an ordinary brick, with a mass of 1.8 kg. It is pulled across the surface of a wooden table. Friction is measured by pulling the brick with a string attached to a spring scale, calibrated in newtons (N). When the brick is pulled at constant speed, the reading on the scale is equal to the force of friction between the brick and the table top. Experiment 1 : The brick is placed on the table in three different positions. First, it is allowed to rest on its broad face (area $= 180 c m^{2}$ ), then on its side (area $= 130 c m^{2}$ ), and finally on its end (area $= 56 c m^{2}$ ) Table 1 $\begin{matrix} A r e a (c m^{2}) & 180 & 130 & 56 F r i c t i o n (N) & 7.1 & 7.3 & 7.2 \end{matrix}$ Experiment 2: A wooden block of mass 0.6 kg is made to the same dimensions as the brick, and the experiment is repeated. Table 2 $\begin{matrix} A r e a (c m^{2}) & 180 & 130 & 56 F r i c t i o n (N) & 1.2 & 1.1 & 1.2 \end{matrix}$ Experiment 3: The time, the wooden block is loaded by adding 1.2 kg of extra mass on top of it, to give it the same weight as the brick. Table 3 $\begin{matrix} A r e a (c m^{2}) & 180 & 130 & 56 F r i c t i o n (N) & 3.5 & 3.6 & 3.7 \end{matrix}$ Which combination of experiments shows that the amount of friction depends on the weight of the object?

9568.

A physicist is investigating the effect that different conditions have on the force of friction. The material used is an ordinary brick, with a mass of 1.8 kg. It is pulled across the surface of a wooden table. Friction is measured by pulling the brick with a string attached to a spring scale, calibrated in newtons (N). When the brick is pulled at constant speed, the reading on the scale is equal to the force of friction between the brick and the table top. Experiment 1 : The brick is placed on the table in three different positions. First, it is allowed to rest on its broad face (area =180 cm2), then on its side (area =130 cm2 ), and finally on its end (area =56 cm2 ) Table 1 Area (cm2)18013056Friction (N)7.17.37.2 Experiment 2: A wooden block of mass 0.6 kg is made to the same dimensions as the brick, and the experiment is repeated. Table 2 Area (cm2)18013056Friction (N)1.21.11.2 Experiment 3: The time, the wooden block is loaded by adding 1.2 kg of extra mass on top of it, to give it the same weight as the brick. Table 3 Area (cm2)18013056Friction (N)3.53.63.7 Which combination of experiments shows that the amount of friction depends on the weight of the object?

Answer»

A physicist is investigating the effect that different conditions have on the force of friction. The material used is an ordinary brick, with a mass of 1.8 kg. It is pulled across the surface of a wooden table. Friction is measured by pulling the brick with a string attached to a spring scale, calibrated in newtons (N). When the brick is pulled at constant speed, the reading on the scale is equal to the force of friction between the brick and the table top.
Experiment 1 : The brick is placed on the table in three different positions. First, it is allowed to rest on its broad face (area $= 180 c m^{2}$ ), then on its side (area $= 130 c m^{2}$ ), and finally on its end (area $= 56 c m^{2}$ )
Table 1
$\begin{matrix} A r e a (c m^{2}) & 180 & 130 & 56 F r i c t i o n (N) & 7.1 & 7.3 & 7.2 \end{matrix}$

Experiment 2: A wooden block of mass 0.6 kg is made to the same dimensions as the brick, and the experiment is repeated.
Table 2
$\begin{matrix} A r e a (c m^{2}) & 180 & 130 & 56 F r i c t i o n (N) & 1.2 & 1.1 & 1.2 \end{matrix}$

Experiment 3: The time, the wooden block is loaded by adding 1.2 kg of extra mass on top of it, to give it the same weight as the brick.
Table 3
$\begin{matrix} A r e a (c m^{2}) & 180 & 130 & 56 F r i c t i o n (N) & 3.5 & 3.6 & 3.7 \end{matrix}$
Which combination of experiments shows that the amount of friction depends on the weight of the object?

Discussion

9569.	Derive the expression for kinetic energy. [5 MARKS]
Answer» Derive the expression for kinetic energy. [5 MARKS]

Discussion

9570.	A pin or a needle floats on the surface of water, the reason for this is
Answer» A pin or a needle floats on the surface of water, the reason for this is

9570.

A pin or a needle floats on the surface of water, the reason for this is

Answer»

A pin or a needle floats on the surface of water, the reason for this is

Discussion

9571.	A balloon is at a height of 81m and is ascending upwards with a velocity of 12 m/s. A body of 2kg weight is dropped from it. If g=10ms−2 the body will reach the surface of the earth in how much time?
Answer» A balloon is at a height of 81m and is ascending upwards with a velocity of 12 m/s. A body of 2kg weight is dropped from it. If $g = 10 m s^{- 2}$ the body will reach the surface of the earth in how much time?

Discussion

9572.	Charcoal burns in air producing:
Answer» Charcoal burns in air producing:

Discussion

9573.	what is sound
Answer» what is sound

Discussion

9574.	a particle of mass 0.5 kg is kept at rest. a force of 2.0N acts on it for 5.0 s. find the distance moved by the particle. a) these 5.0 s, and b) the next 5.0 s
Answer» a particle of mass 0.5 kg is kept at rest. a force of 2.0N acts on it for 5.0 s. find the distance moved by the particle. a) these 5.0 s, and b) the next 5.0 s

Discussion

9575.	The relative density of silver is 10.8 , if the density of water be 1000 kg/m3 . Calculate the density of silver .
Answer» The relative density of silver is 10.8 , if the density of water be 1000 kg/m³. Calculate the density of silver .

Discussion

9576.	For a liquid the coefficients of apparent and real expansions respectively, are related as :
Answer» For a liquid the coefficients of apparent and real expansions respectively, are related as :

Discussion

9577.	Summer Solstice takes place on –
Answer» Summer Solstice takes place on –

Discussion

9578.	The defect of the eye caused due to the curvature of the vertical surface of the eye lens being greater than that of the horizontal surface and vice versa is called
Answer» The defect of the eye caused due to the curvature of the vertical surface of the eye lens being greater than that of the horizontal surface and vice versa is called

Discussion

9579.	What is the difference between kinetic and potential energy?
Answer» What is the difference between kinetic and potential energy?

Discussion

9580.	Is work done a scalar or vector quantity?
Answer» Is work done a scalar or vector quantity?

Discussion

9581.	If you pull a pendulum to one side and release it, will it stop after some time? Give reason.
Answer» If you pull a pendulum to one side and release it, will it stop after some time? Give reason.

Discussion

9582.	How much momentum does a dumbbell of mass 10 kg transfer to the floor if it falls from a height of 80 cm, assuming that the dumbbell stops after hitting the ground? (g=10 ms−2)
Answer» How much momentum does a dumbbell of mass 10 kg transfer to the floor if it falls from a height of 80 cm, assuming that the dumbbell stops after hitting the ground? ( $g = 10 m s^{- 2}$ )

Discussion

9583.	A car travels 30km at a uniform speed of 40 km/h and the next 30km at a uniform speed of 20km/h. Find its average speed.
Answer» A car travels 30km at a uniform speed of 40 km/h and the next 30km at a uniform speed of 20km/h. Find its average speed.

Discussion

9584.	A car is traveling along the road at 8ms−1. It accelerates at 1 ms−2 for a distance of 18 m. How fast is it then traveling?
Answer» A car is traveling along the road at 8 $m s^{- 1}$ . It accelerates at 1 $m s^{- 2}$ for a distance of 18 m. How fast is it then traveling?

Discussion

9585.	A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity.
Answer» A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity.

Discussion

9586.	If the distance between two masses be increased by a factor of 6, what factor would the mass of one of them have to be altered to maintain the same gravitational force? Would this be an increase or decrease in the mass?
Answer» If the distance between two masses be increased by a factor of 6, what factor would the mass of one of them have to be altered to maintain the same gravitational force? Would this be an increase or decrease in the mass?

Discussion

9587.	The magnetic field is a ___ quantity.
Answer» The magnetic field is a ___ quantity.

Discussion

9588.	A track of mass 1800 kg moving with a speed of 54 kg per hour.when brakes are applied it stops with uniform negative acceleration at a distance of 200 m. calculate the force applied by the brakes of the truck and the work done before stopping.
Answer» A track of mass 1800 kg moving with a speed of 54 kg per hour.when brakes are applied it stops with uniform negative acceleration at a distance of 200 m. calculate the force applied by the brakes of the truck and the work done before stopping.

Discussion

9589.	Area under a velocity-time graph gives
Answer» Area under a velocity-time graph gives

Discussion

9590.	A bus accelerates uniformly 54 km/h to 72 km/h in 10 sec calculate acceleration in m/s2 and distance covered by the bus in meters during this interval.
Answer» A bus accelerates uniformly 54 km/h to 72 km/h in 10 sec calculate acceleration in m/s²and distance covered by the bus in meters during this interval.

Discussion

9591.	John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr, taking total of 8 hours to cover the distance of 400 km, How many hours he has been driving at 20 km/hr?
Answer» John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr, taking total of 8 hours to cover the distance of 400 km, How many hours he has been driving at 20 km/hr?

Discussion

9592.	Why knife have sharp edges
Answer» Why knife have sharp edges

Discussion

9593.	On the day of Equinox the sun rays are vertical at the –
Answer» On the day of Equinox the sun rays are vertical at the –

Discussion

9594.	A truck starts from rest and rolls down a hill with a constant acelleration. It travels a distance of 400m in 20s. Find the acelleration. Find the force acting on the body if its mass is 7 metric tonnes.
Answer» A truck starts from rest and rolls down a hill with a constant acelleration. It travels a distance of 400m in 20s. Find the acelleration. Find the force acting on the body if its mass is 7 metric tonnes.

Discussion

9595.	A boy makes a ruler with graduations in cm on it (i.e., 100 divisions in 1 m). To what accuracy this ruler can measure ? How can this accuracy be increased ?
Answer» A boy makes a ruler with graduations in cm on it (i.e., 100 divisions in 1 m). To what accuracy this ruler can measure ? How can this accuracy be increased ?

Discussion

9596.	A body moves with a velocity of 10 m/s for 10 s and then with a velocity of 20 m/s in the same direction for 40 s. Find its average velocity.
Answer» A body moves with a velocity of 10 m/s for 10 s and then with a velocity of 20 m/s in the same direction for 40 s. Find its average velocity.

Discussion

9597.	How liquids can exert an upward force on an object when gravity is acting on that object
Answer» How liquids can exert an upward force on an object when gravity is acting on that object

Discussion

9598.	What does rate of change rate of change of acceleration mean?
Answer» What does rate of change rate of change of acceleration mean?

Discussion

9599.	I have many questions. Why do liquids when thrown spread and then stop after sometime? Why are liquids able to float? How can you justify that rate of diffusion is more in liquids than solids?
Answer» I have many questions. Why do liquids when thrown spread and then stop after sometime? Why are liquids able to float? How can you justify that rate of diffusion is more in liquids than solids?

9599.

I have many questions. Why do liquids when thrown spread and then stop after sometime? Why are liquids able to float? How can you justify that rate of diffusion is more in liquids than solids?

Answer»

I have many questions.

Why do liquids when thrown spread and then stop after sometime?

Why are liquids able to float?

How can you justify that rate of diffusion is more in liquids than solids?

Discussion

9600.	What is parsec?
Answer» What is parsec?

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following quantities has the greatest influence on the amount of kinetic energy that a car possesses while moving on the road?

The acceleration due to gravity g and the mean density of earth p are related by which relation.? {G=gravitational constant, R= radius of earth{

The slope of the velocity - time graph for retarded motion is

A non-zero force is acting on a body but work done is zero. Which of the following statements justify the above situation? 1. Distance moved is zero. 2. Force is perpendicular to the direction of motion. 3. Force is in the direction of motion. 4. Force is opposite to the direction of motion.

Why do asteroids heat up when they enter the Earth's atmosphere?

Audible range of sound of human being is

A body is thrown vertically upwards with velocity u. The greatest height h to which it will rise is;

Question 5 A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your answer.

Which of the following statements is correct for a round trip along the same route?

Observe the given distance - time graph. Identify the respective speeds of the body when it moves from O to A and B to C.

A block is placed on the table. What is the angle between the action of the block on the table and reaction of the table on the block?

The measure of inertia of an object is:

A body of mass 500 g which is initially at rest is acted upon by a force. The body moves a distance of 4 m in 2 s. The force applied is _____.

Inertia is dependent upon _____.

State whether the following objects posses kinetic energy, potential energy, or both : (a) A man climbing a hill (b) A flying aeroplan (c) A bird running on the ground (d) A ceiling fan in the off position (e) A stretched spring lying on the ground.

Live wire is:

Derive the expression for kinetic energy. [5 MARKS]

A pin or a needle floats on the surface of water, the reason for this is

A balloon is at a height of 81m and is ascending upwards with a velocity of 12 m/s. A body of 2kg weight is dropped from it. If g=10ms−2 the body will reach the surface of the earth in how much time?

Charcoal burns in air producing:

what is sound

a particle of mass 0.5 kg is kept at rest. a force of 2.0N acts on it for 5.0 s. find the distance moved by the particle. a) these 5.0 s, and b) the next 5.0 s

The relative density of silver is 10.8 , if the density of water be 1000 kg/m3 . Calculate the density of silver .

For a liquid the coefficients of apparent and real expansions respectively, are related as :

Summer Solstice takes place on –

The defect of the eye caused due to the curvature of the vertical surface of the eye lens being greater than that of the horizontal surface and vice versa is called

What is the difference between kinetic and potential energy?

Is work done a scalar or vector quantity?

If you pull a pendulum to one side and release it, will it stop after some time? Give reason.

How much momentum does a dumbbell of mass 10 kg transfer to the floor if it falls from a height of 80 cm, assuming that the dumbbell stops after hitting the ground? (g=10 ms−2)

A car travels 30km at a uniform speed of 40 km/h and the next 30km at a uniform speed of 20km/h. Find its average speed.

A car is traveling along the road at 8ms−1. It accelerates at 1 ms−2 for a distance of 18 m. How fast is it then traveling?

A force of 20 N acting on a body of mass 10 kg is found to double its velocity in 8 s. Find its initial velocity.

If the distance between two masses be increased by a factor of 6, what factor would the mass of one of them have to be altered to maintain the same gravitational force? Would this be an increase or decrease in the mass?

The magnetic field is a ___ quantity.

A track of mass 1800 kg moving with a speed of 54 kg per hour.when brakes are applied it stops with uniform negative acceleration at a distance of 200 m. calculate the force applied by the brakes of the truck and the work done before stopping.

Area under a velocity-time graph gives

A bus accelerates uniformly 54 km/h to 72 km/h in 10 sec calculate acceleration in m/s2 and distance covered by the bus in meters during this interval.

John covers a part of the journey at 20 km/hr and the remaining at 70 km/hr, taking total of 8 hours to cover the distance of 400 km, How many hours he has been driving at 20 km/hr?

Why knife have sharp edges

On the day of Equinox the sun rays are vertical at the –

A truck starts from rest and rolls down a hill with a constant acelleration. It travels a distance of 400m in 20s. Find the acelleration. Find the force acting on the body if its mass is 7 metric tonnes.

A boy makes a ruler with graduations in cm on it (i.e., 100 divisions in 1 m). To what accuracy this ruler can measure ? How can this accuracy be increased ?

A body moves with a velocity of 10 m/s for 10 s and then with a velocity of 20 m/s in the same direction for 40 s. Find its average velocity.

How liquids can exert an upward force on an object when gravity is acting on that object

What does rate of change rate of change of acceleration mean?

I have many questions. Why do liquids when thrown spread and then stop after sometime? Why are liquids able to float? How can you justify that rate of diffusion is more in liquids than solids?

What is parsec?