A 10N force moves a body around a circular path of radius 50 cm. What is work done completing one revolution?
Correct answer: B. Zero
- A. 51 J
- B. Zero
- C. 31.42 J
- D. 500 J
Explanation
When the body completes one revolution, it comes back to its initial position, so its displacement becomes zero, and the work done will be zero as well.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Work
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
Practise Work and Energy
748 free Work and Energy MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Work questions
Work done by the centripetal force on a body moving in circle is zero because
The circle of mass 'm' is tied to the end of a string of length 'l' and rotated through the other end along a horizontal circular path with speed 'v'. The work done in full horizontal circle is:
A satellite is moving in a circular orbit at a constant speed due to gravity. Which of the following statements is correct about the above figure?
The force which can do no work on the body on which it acts:
A 1.75 m tall weight-lifter raises a weight of mass 50 kg to a height of 0.5 m above its head. How much work is being done by it? (g = 10 ms-2)
The given diagram represents a boy lifting a block in the upward direction.The work done by the gravitational force on the block is