50+ Work-Energy Theorem for a Variable Force MCQs and Answers

Work-Energy Theorem for a Variable Force MCQs 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-Energy Theorem for a Variable Force MCQs

1. A “variable force” is the force that only increases with time.

a) True

b) False

View Answer

Answer: b

2. For a body moving from position Xa to position Xb under a variable force, what is the work done?

a) W = F * (X2 – X1)

b) -W = F * (X2 – X1)

c) W = -F * (X2 – X1)

d) W = F * (X1 – X2)

Answer: a

3. The work-energy theorem is valid only for positive work done.

a) True

b) False

Answer: b

4. A car having a mass of 1 metric ton is moving with a speed of 30 m/s. It suddenly applies the brakes and skids to rest in a certain distance d. The frictional force between the tyres and road is 6000 N. What is the value of d?

a) 25 m

b) 50 m

c) 75 m

d) 100 m

Answer: c

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