Work, Energy, and Power Quiz - CBSE Class 11 Physics

Free practice quiz: Work, Energy, and Power (CBSE Class 11 Physics). 39 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Physics practice quiz has 39 multiple-choice questions on Work, Energy, and Power. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the work done when a force of 10 N moves an object 5 m in the direction of the force?

   1. 50 J
   2. 100 J
   3. 10 J
   4. 25 J
   Show answer

   Answer: A. 50 J

2. If 15 J of work is done to lift a 1.5 kg object, what is the height to which it is raised?

   1. 1 m
   2. 2 m
   3. 3 m
   4. 4 m
   Show answer

   Answer: A. 1 m

3. What happens to the total mechanical energy of an object in free fall neglecting air resistance?

   1. It increases
   2. It decreases
   3. It remains constant
   4. It becomes zero
   Show answer

   Answer: C. It remains constant

4. A baseball and a bowling ball are both dropped from the same height. When they reach the ground, which has a greater potential energy just before impact?

   1. Baseball
   2. Bowling Ball
   3. Both have the same potential energy
   4. Cannot determine
   Show answer

   Answer: B. Bowling Ball

5. What is the work done by a force of 10 N moving an object 5 m in the direction of the force?

   1. 50 J
   2. 10 J
   3. 5 J
   4. 15 J
   Show answer

   Answer: A. 50 J

More questions in this quiz

Answers and explanations are in the full quiz.

1. If a person lifts a 20 kg object to a height of 2 m, what is the work done against gravity? (Take g = 10 m/s²)
2. What is the kinetic energy of a 2 kg object moving at a speed of 3 m/s?
3. Which of the following represents the conservation of energy?
4. An object of mass m falls freely from a height h. What will be its speed just before hitting the ground?
5. If 500 J of work is done to lift an object, how much potential energy does the object gain?
6. In a system, where does the maximum kinetic energy occur during an object’s motion?
7. A car accelerates from rest to a speed of 20 m/s. What type of energy does the car gain?
8. What is the kinetic energy of an object of mass 2 kg moving at a velocity of 3 m/s?
9. How much work is done against gravity to lift a 10 kg object to a height of 2 m?
10. If an object at rest is subjected to a net force, what will happen to its energy?
11. Which of the following is a unit of power?
12. A machine does 3000 J of work in 60 seconds. What is its power output?
13. How much work is done if a force of 30 N is applied perpendicularly to the direction of displacement of 4 m?
14. If a child lifts a 5 kg toy to a height of 0.5 m, what is the work done against gravity?
15. What happens to the energy of an object when it is brought to a stop?
16. What is the relationship between work done and energy transferred?
17. How does the total mechanical energy of a closed system behave?
18. If a car moves with a constant velocity, what is the work done by the net force on the car?
19. An object is lifted to a height of 2 m with a force of 20 N. How much work is done against gravity?
20. A spring is compressed by 0.5 m and has a spring constant of 200 N/m. What is the potential energy stored in the spring?
21. If a car accelerates at a constant rate, what can be said about the work done on the car?
22. A vehicle moves up a hill, gaining height and potential energy. What happens to its kinetic energy?
23. What is the relationship between work, energy, and force in a closed system?
24. A skier starts from rest and slides down a slope. As she descends, what happens to her gravitational potential energy?
25. In which of the following cases is work done equal to the force times the displacement?
26. A body in motion possesses what type of energy?
27. What happens to the total mechanical energy of a system if only conservative forces do work?
28. If a person lifts a box weighing 20 N to a height of 3 m, what is the work done against gravity?
29. Kinetic energy of an object is given by which of the following equations?
30. What is the potential energy of a 10 kg mass at a height of 5 m? (g = 9.8 m/s^2)
31. If a car increases its speed from 20 m/s to 40 m/s, how does the kinetic energy change?
32. What is the relationship between work, energy, and power?
33. If a machine has an efficiency of 80% and does 400 J of useful work, how much energy was supplied?
34. If a 2 kg object is moving with a velocity of 3 m/s, what is its kinetic energy?

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