50+ Work MCQ and Answers (Multiple Choice Questions)

Work MCQ and Answers are must for the aspirants who are preparing for various competitive examination. It covers the concept of Work, Energy and Power which is very important for any competitive exams. This Law of Work, Energy and Power topic is given most importance in various competitive exams like JEE Main, JEE Advanced, NEET, AIIMS etc.

Work MCQ and Answers

1. Work being a scalar quantity sometimes has negative and positive signs. What does the sign suggest?

a) The direction of work

b) Relative directions of force and displacement

c) The direction of force

d) The direction of displacement

Answer: b

2. A force of 40 N acts on body of mass 5 Kg which is initially at rest. What is the amount of work done in the first 10 s?

a) 16000 J

b) -16000 J

c) 400 J

d) -400 J

Answer: a

3. The work done on a body of mass 5 Kg is 70 J. What is the magnitude of the force applied if the total displacement it covered is 7 m.

a) 10 N

b) -10 N

c) 20 N

d) 70 N

Answer: a

4. A body of mass 40 Kg covers a distance of 50 m in 5s starting from rest under the influence of a force. What is the work done by the force on the body?

a) 8000 J

b) -8000 J

c) 20000 J

d) 800 J

Answer: a

5. A block of mass 10 Kg accelerates from rest to a velocity of 20 m/s in 5s under the influence of an external force. What is the work done by the external force?

a) 2000 J

b) -2000 J

c) 20000 J

d) -20000 J

Answer: a

6. A force of 10 N creates a displacement of 2 m but the work done on the body throughout its motion is equal to 70 J. What possibly can be the reason or this?

a) There are multiple forces action on the body

b) The body is at rest

c) The force is not uniform

d) The displacement is harmonic

Answer: a

7. Work done by a force on a body is an example of ______

a) Mechanical work

b) Electrical work

c) Magnetic work

d) Thermodynamic work

Answer: a

8. Work done in a system is ___

a) The measure of energy change

b) The measure of useful work

c) The measure of displacement

d) The measure of force

Answer: a

9. Work is a _______

a) Scalar quantity

b) Vector quantity

c) Foreign quantity

d) Magnitude less quantity

Answer: a

10. A force of 40 N acts on body of mass 5 Kg. What is the amount of work done if the total displacement is 2 m and is in the direction of the force applied?

a) 80 J

b) -80 J

c) 40 J

d) 16 J

Answer: a

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