Work and Energy Class 11 MCQs for Students

5/5 - (1 vote)

Work and Energy Class 11 MCQs. We covered all the Work and Energy Class 11 MCQs in this post for free so that you can practice well for the exam.

Install our MCQTUBE Android app from the Google Play Store and prepare for any competitive government exams for free.

We have divided the complete NEET syllabus into several small posts on our website for your convenience. You will get their respective links in the related posts section provided below.

Related Posts:

Join Telegram Group and Get FREE Alerts! Join Now

Join WhatsApp Group For FREE Alerts! Join Now

Questions hide

MCQ on Work and Energy for NEET Students

Calculate the ratio of the rate of work done by a boy of 40 kg and a man of 50 kg if they run up a staircase in 20 seconds and 40 sec respectively.

The potential energy (in joule) of a body of mass 2 kg moving in the x-y plane is given by U = 6x + 8y, where the position coordinates x and y are measured in meters. If the body is at rest at point (4 m, 3 m) at time t = 0, then it will cross the y-axis at time t equal to

What will be the kinetic energy of a body of mass kg, 2 m above the ground, when it falls from 10 to a height of 20 m? (g = 10 m/s²)

Find the K.E. of a block of mass 20 kg moving in x direction with a constant speed of 5 m/s at 30 m, if it is subjected to a resistive force F = 0.2 x J/m during its travel from x = 10 m to 30 m.

Two forces 5 N and 8 N act simultaneously on a stationary body of mass 15 kg at right angles to each other and sets it into motion. The kinetic energy of the body at the end of 15 s is

Find the work done in one rotation by a 0.5 hp motor if it runs at a speed of 500 r.p.m with an efficiency of 60%.

What will be the instantaneous power delivered to the body of mass 20 kg for a fraction of time t which accelerates uniformly from rest to 20 m/s in 10 s?

Find the maximum acceleration given to a 1000 kg car, moving with a speed of 40 m/s. The engine of the car delivers 50 kW while resistive force due to the surface is 600 N.

What will be the maximum compression of the spring if an object of mass 2 kg strikes it with a speed of 2 m/s? (k = 50 N/m)

Calculate the ratio of the output power of the first man to the second man, if the first man does a given amount of work in 20 seconds and another man does the same amount of work in 25 seconds.

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that

Find the power delivered to the turbine if water is falling on it at a rate of 200 kg/s from a height of 50 m. (g = 10 m/s²)

A towing van of 100 kW power is required to drag a bus on a horizontal road with a constant speed of 10 m/s. The force exerted by the van will be

What will be the average power of the engine of a car of mass 600 kg which uniformly accelerates from rest to a velocity of 108 km/hr in 10 s?

The kinetic energy of a body is directly proportional to

If a shell fired from a cannon explodes in mid-air, then

Calculate the increase in kinetic energy of a body of mass 10 kg having the momentum of 10 kg m/s when a force of 3 N is applied to it for 10 s.

Find the ratio of velocities of a nucleus that splits into two nuclear parts having radii in the ratio 1 : 4.

Calculate power to be supplied to a motor boat to move with a speed of 4 m/s when hit by water with a force of 300 N. ( Work and Energy Class 11 MCQs )

A bomb of mass 6 kg divides into two parts whose ratio of masses is 1 4. Calculate the momentum of the bigger part if the kinetic energy of the smaller part is 200 J.

Find the ratio of the masses of two bodies having kinetic energies in the ratio 5 : 1 and moving with equal liner momentum.

Calculate the amount of work required to raise the ladder from the horizontal position to the vertical position, when it is 3 m long with a weight of 200 N, has its center of gravity 1 m from its bottom, and a weight of 50 N attached to its top end.

A spring stores an energy of 50 J when it is stretched by 2 cm. If it is further stretched by 2 cm, the stored energy will be increased by

A block of 2 kg at rest starts moving under the action of 20 N force. If the coefficient of friction between the block and the floor is 0.3 then, work done by the force in 5 s is (Take g = 10 m/s²)

Two solid balls of mass 4 kg and 3 kg respectively move in the opposite direction with a velocity of 0.4 m/s and x m/s. After the collision, the two balls come to rest then the value of x will be,

Find the work done by a man against gravity, if he carries a stone of 10 kg on his head on a level road. ( Work and Energy Class 11 MCQs )

Calculate work done in displacing a particle from x = 0 to x = 5 m under the application of a force F = (0.2x + 10) N.

Calculate the work done by a force of 6 N in maintaining a velocity of 4 m/s of 8 kg block for one minute.

Find the combined velocity of two objects after collision if mass of two objects are 1 kg and 2 kg respectively and their velocity before collision are 4 m/s and 0 m/s respectively

A packet is resting on a smooth horizontal plane making an angle of 30° with the horizontal. When work of 20 J is done on the packet, it gets displaced by 5 m. The force applied on the packet is

The ratio of the relative velocity of separation after a collision to the relative velocity of approach before the collision between two colliding bodies is ……..

MCQ on Work and Energy for NEET Students

Calculate the ratio of the rate of work done by a boy of 40 kg and a man of 50 kg if they run up a staircase in 20 seconds and 40 sec respectively.

(A) 8 : 5

(B) 4 : 3

(D) 6:12

Option a – 8 : 5

The potential energy (in joule) of a body of mass 2 kg moving in the x-y plane is given by U = 6x + 8y, where the position coordinates x and y are measured in meters. If the body is at rest at point (4 m, 3 m) at time t = 0, then it will cross the y-axis at time t equal to

(A) 1.63 s

(B) 1.2 s

(D) 2.4 s

Option a – 1.63 s

What will be the kinetic energy of a body of mass kg, 2 m above the ground, when it falls from 10 to a height of 20 m? (g = 10 m/s²)

(A) 1200 J

(B) 2000 J

(D) 1800 J

Option d – 1800 J

Find the K.E. of a block of mass 20 kg moving in x direction with a constant speed of 5 m/s at 30 m, if it is subjected to a resistive force F = 0.2 x J/m during its travel from x = 10 m to 30 m.

(A) 120 J

(B) 150 J

(D) 280 J

Option c – 170 J

Two forces 5 N and 8 N act simultaneously on a stationary body of mass 15 kg at right angles to each other and sets it into motion. The kinetic energy of the body at the end of 15 s is

(A) 423.2 J

(B) 555.4 J

(D) 721.4 J

Option c – 667.5 J

Find the work done in one rotation by a 0.5 hp motor if it runs at a speed of 500 r.p.m with an efficiency of 60%.

(A) 12.64 J

(B) 26.87 J

(D) 46.48 J

Option b – 26.87 J

What will be the instantaneous power delivered to the body of mass 20 kg for a fraction of time t which accelerates uniformly from rest to 20 m/s in 10 s?

(A) 100 t

(B) 80 t

(D) 40 t

Option b – 80 t

Find the maximum acceleration given to a 1000 kg car, moving with a speed of 40 m/s. The engine of the car delivers 50 kW while resistive force due to the surface is 600 N.

(A) 0.65 m/s²

(B) 0.5 m/s²

(D) 2.6 m/s²

Option a – 0.65 m/s²

What will be the maximum compression of the spring if an object of mass 2 kg strikes it with a speed of 2 m/s? (k = 50 N/m)

(A) 0.1 m

(B) 0.8 m

(D) 0.2 m

Option c – 0.4 m

Calculate the ratio of the output power of the first man to the second man, if the first man does a given amount of work in 20 seconds and another man does the same amount of work in 25 seconds.

(A) 2 : 3

(B) 5 : 4

(D) 4 : 5

Option b – 5 : 4

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that

(A) its velocity is constant.

(B) its acceleration is constant.

(D) it moves in a straight line.

Option c – its kinetic energy is constant.

Find the power delivered to the turbine if water is falling on it at a rate of 200 kg/s from a height of 50 m. (g = 10 m/s²)

(A) 400 kW

(B) 100 kW

(D) 200 kW

Option b – 100 kW

A towing van of 100 kW power is required to drag a bus on a horizontal road with a constant speed of 10 m/s. The force exerted by the van will be

(A) 15 kN

(B) 30 kN

(D) 20 kN

Option c – 10 kN

What will be the average power of the engine of a car of mass 600 kg which uniformly accelerates from rest to a velocity of 108 km/hr in 10 s?

(A) 20 kW

(B) 47 kW

(D) 32 kW

Option c – 27 kW

The kinetic energy of a body is directly proportional to

(A) the amount of work required to stop a moving body.

(B) the velocity of a moving body.

(D) acceleration of a moving body.

Option a – the amount of work required to stop a moving body

If a shell fired from a cannon explodes in mid-air, then

(A) its total momentum increases.

(B) its total momentum decreases.

(D) its total kinetic energy increases.

Option d – its total kinetic energy increases

Calculate the increase in kinetic energy of a body of mass 10 kg having the momentum of 10 kg m/s when a force of 3 N is applied to it for 10 s.

(A) 30 J

(B) 80 J

(D) 75 J

Option d – 75 J

Find the ratio of velocities of a nucleus that splits into two nuclear parts having radii in the ratio 1 : 4.

(A) 4 : 1

(B) 8 : 1

(D) 32 : 1

Option c – 64 : 1

Calculate power to be supplied to a motor boat to move with a speed of 4 m/s when hit by water with a force of 300 N. ( Work and Energy Class 11 MCQs )

(A) 0.5 kW

(B) 1.2 kW

(D) 1.5 kW

Option b – 1.2 kW

A bomb of mass 6 kg divides into two parts whose ratio of masses is 1 4. Calculate the momentum of the bigger part if the kinetic energy of the smaller part is 200 J.

(A) 22 kg m/s

(B) 33 kg m/s

(D) 11 kg m/s

Option a – 22 kg m/s

Find the ratio of the masses of two bodies having kinetic energies in the ratio 5 : 1 and moving with equal liner momentum.

(A) 5 : 1

(B) 10 : 1

(D) 1 : 5

Option d – 1 : 5

Calculate the amount of work required to raise the ladder from the horizontal position to the vertical position, when it is 3 m long with a weight of 200 N, has its center of gravity 1 m from its bottom, and a weight of 50 N attached to its top end.

(A) 450 J

(B) 150 J

(D) 350 J

Option d – 350 J

A spring stores an energy of 50 J when it is stretched by 2 cm. If it is further stretched by 2 cm, the stored energy will be increased by

(A) 150 J

(B) 90 J

(D) 300 J

Option a – 150 J

A block of 2 kg at rest starts moving under the action of 20 N force. If the coefficient of friction between the block and the floor is 0.3 then, work done by the force in 5 s is (Take g = 10 m/s²)

(A) 900 J

(B) 1750 J

(D) 2341 J

Option b – 1750 J

Two solid balls of mass 4 kg and 3 kg respectively move in the opposite direction with a velocity of 0.4 m/s and x m/s. After the collision, the two balls come to rest then the value of x will be,

(A) – 0.28 m/s

(B) -0.64 m/s

(D) -0.53 m/s

Option d – -0.53 m/s

Find the work done by a man against gravity, if he carries a stone of 10 kg on his head on a level road. ( Work and Energy Class 11 MCQs )

(A) Zero

(B) 40 J

(D) 20 J

Option a – Zero

Calculate work done in displacing a particle from x = 0 to x = 5 m under the application of a force F = (0.2x + 10) N.

(A) 23.45 J

(B) 62.3 J

(D) 52.5 J

Option d – 52.5 J

Calculate the work done by a force of 6 N in maintaining a velocity of 4 m/s of 8 kg block for one minute.

(A) 1440 J

(B) 1860 J

(D) 1206 J

Option a – 1440 J

Find the combined velocity of two objects after collision if mass of two objects are 1 kg and 2 kg respectively and their velocity before collision are 4 m/s and 0 m/s respectively

(A) 4.96 m/s

(B) 2.33 m/s

(D) 1.33 m/s

Option d – 1.33 m/s

A packet is resting on a smooth horizontal plane making an angle of 30° with the horizontal. When work of 20 J is done on the packet, it gets displaced by 5 m. The force applied on the packet is

(A) 4.61 N

(B) 5.28 N

(D) 6.23 N

Option a – 4.61 N

The ratio of the relative velocity of separation after a collision to the relative velocity of approach before the collision between two colliding bodies is ……..

(A) the velocity of collision

(B) the sum of the velocities

(D) the coefficient of restitution

Option d – the coefficient of restitution

We covered all the work and energy class 11 MCQs above in this post for free so that you can practice well for the exam.

Check out the latest MCQ content by visiting our mcqtube website homepage.

Also, check out:

MCQs on Enzymes
NEET Bio MCQ
Life Processes Class 10 MCQ with Answers

MCQ on Work and Energy for NEET Students

Calculate the ratio of the rate of work done by a boy of 40 kg and a man of 50 kg if they run up a staircase in 20 seconds and 40 sec respectively.

The potential energy (in joule) of a body of mass 2 kg moving in the x-y plane is given by U = 6x + 8y, where the position coordinates x and y are measured in meters. If the body is at rest at point (4 m, 3 m) at time t = 0, then it will cross the y-axis at time t equal to

What will be the kinetic energy of a body of mass kg, 2 m above the ground, when it falls from 10 to a height of 20 m? (g = 10 m/s²)

Find the K.E. of a block of mass 20 kg moving in x direction with a constant speed of 5 m/s at 30 m, if it is subjected to a resistive force F = 0.2 x J/m during its travel from x = 10 m to 30 m.

Two forces 5 N and 8 N act simultaneously on a stationary body of mass 15 kg at right angles to each other and sets it into motion. The kinetic energy of the body at the end of 15 s is

Find the work done in one rotation by a 0.5 hp motor if it runs at a speed of 500 r.p.m with an efficiency of 60%.

What will be the instantaneous power delivered to the body of mass 20 kg for a fraction of time t which accelerates uniformly from rest to 20 m/s in 10 s?

Find the maximum acceleration given to a 1000 kg car, moving with a speed of 40 m/s. The engine of the car delivers 50 kW while resistive force due to the surface is 600 N.

What will be the maximum compression of the spring if an object of mass 2 kg strikes it with a speed of 2 m/s? (k = 50 N/m)

Calculate the ratio of the output power of the first man to the second man, if the first man does a given amount of work in 20 seconds and another man does the same amount of work in 25 seconds.

A particle is acted upon by a force of constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that

Find the power delivered to the turbine if water is falling on it at a rate of 200 kg/s from a height of 50 m. (g = 10 m/s²)

A towing van of 100 kW power is required to drag a bus on a horizontal road with a constant speed of 10 m/s. The force exerted by the van will be

What will be the average power of the engine of a car of mass 600 kg which uniformly accelerates from rest to a velocity of 108 km/hr in 10 s?

The kinetic energy of a body is directly proportional to

If a shell fired from a cannon explodes in mid-air, then

Calculate the increase in kinetic energy of a body of mass 10 kg having the momentum of 10 kg m/s when a force of 3 N is applied to it for 10 s.

Find the ratio of velocities of a nucleus that splits into two nuclear parts having radii in the ratio 1 : 4.

Calculate power to be supplied to a motor boat to move with a speed of 4 m/s when hit by water with a force of 300 N. ( Work and Energy Class 11 MCQs )

A bomb of mass 6 kg divides into two parts whose ratio of masses is 1 4. Calculate the momentum of the bigger part if the kinetic energy of the smaller part is 200 J.

Find the ratio of the masses of two bodies having kinetic energies in the ratio 5 : 1 and moving with equal liner momentum.

Calculate the amount of work required to raise the ladder from the horizontal position to the vertical position, when it is 3 m long with a weight of 200 N, has its center of gravity 1 m from its bottom, and a weight of 50 N attached to its top end.

A spring stores an energy of 50 J when it is stretched by 2 cm. If it is further stretched by 2 cm, the stored energy will be increased by

A block of 2 kg at rest starts moving under the action of 20 N force. If the coefficient of friction between the block and the floor is 0.3 then, work done by the force in 5 s is (Take g = 10 m/s²)

Two solid balls of mass 4 kg and 3 kg respectively move in the opposite direction with a velocity of 0.4 m/s and x m/s. After the collision, the two balls come to rest then the value of x will be,

Find the work done by a man against gravity, if he carries a stone of 10 kg on his head on a level road. ( Work and Energy Class 11 MCQs )

Calculate work done in displacing a particle from x = 0 to x = 5 m under the application of a force F = (0.2x + 10) N.

Calculate the work done by a force of 6 N in maintaining a velocity of 4 m/s of 8 kg block for one minute.

Find the combined velocity of two objects after collision if mass of two objects are 1 kg and 2 kg respectively and their velocity before collision are 4 m/s and 0 m/s respectively

A packet is resting on a smooth horizontal plane making an angle of 30° with the horizontal. When work of 20 J is done on the packet, it gets displaced by 5 m. The force applied on the packet is

The ratio of the relative velocity of separation after a collision to the relative velocity of approach before the collision between two colliding bodies is ……..

Leave a Comment Cancel reply