Question

a body of mass m moving along the circumference of a circle of radius r with uniform speed u and completes half the revolution. the work done is ​

Answer 1

Explanation:

Here, Acceleration = 0

Because, body is moving with uniform velocity.

Therefore, Force = ma.

Because, a = 0.

Therefore, F = 0.

Because, Work done = Force × Displacement.

Therefore, Work done = 0 × Displacement.

Therefore, Work done = 0.

This is very logical and typical question.

This question is based on theory not on numeric formulas.

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Answer 2

Answer:

the answer is zero

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