Work, Energy, and Power: Concepts of Work, Kinetic Energy, and Potential Energy

in this quiz, you will find questions based on work, kinetic energy, potential energy, and power.

Start Quiz

According to the work-energy theorem, total change in energy is equal to the _______

Total work done Half of the total work done Total work done added with frictional losses Square of the total work done

The work done by a body while covering a vertical height of 5m is 50 kJ. By how much amount has the energy of the body changed?

50 kJ -50 kJ 25 kJ 10 kJ

The total energy change of a body which covers a vertical height is constituted completely by the potential energy change only when ______

It moves slowly It moves quickly It moves for some time, then rests, then moves again It moves with a decreasing velocity

The change in the total energy of a body moving because of work being done on it is attributed by the change in kinetic energy only when ______

It moves extremely slowly It moves with a very high velocity It moves on an equipotential surface It moves with a positive acceleration

A body having 7 kg of mass moves with a velocity of 20 m/s covers a vertical height of 8.75 m. What is the work done by the moving force in Joules? Take g = 10 m/s2.

0 10 15 20

When a force of 50 N acts on a body, the body is displaced through a distance of 3 m in a direction normal to the direction of the force. The work done by the force

150 J 1470 J Zero -150 J

A body of mass 20 kg is initially at a height of 3 m above the ground. It is lifted to a height of 2 m from that position. Its increase in potential energy is

100 J 392 J 60 J -100 J

A body of mass 10 kg is moved parallel to the ground, through a distance of 2 m. The work done against gravitational force is

196 J -196 J 20 J zero

A quantity of work of 1000 J is done in 2 seconds. The power utilised is

998 W 1002 W 2000 W 500 W

A body of mass 1 kg travels with a velocity of 10 m/s, this a wall and rebounds. If 50% of its initial energy is wasted as heat, its kinetic energy at the instant of rebounding is

20 J 60 J 50 J 25 J

A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?

7.2 J 3.6 J 120 J 1200 J

A body of mass 10 kg is travelling with uniform speed of 5 m/s. Its kinetic energy is

25 J 125 J 1250 J 1000 J

A ball is dropped from a height of 1 m. If the coeffcient of restitution between the surface and ball is 0.6, the ball rebounds to a height of

0.6 m 0.4 m 1 m 0.36 m

A solid cylinder of length 1 m and diameter of cross section y 100 cms is first placed with its axis vertical its then slowly inclined till its axis is horizontal. The loss in its potential energy if the mass of the cylinder is 10 kg is

5g J 10g J Zero g J

A body of mass 10 kg moving at a height of 2 m, with uniform speed of 2 m/s. Its total energy is

316 J 216 J 116 J 392 J

Quiz/Test Summary

Title: Work, Energy, and Power: Concepts of Work, Kinetic Energy, and Potential Energy

Questions: 15

Contributed by: