Work, Energy and Power

Question: A body of mass m is moving in a circle of radius r with a constant speed v. The force on the body is $\frac{{m{v^2}}}{r}$ and is directed towards the centre. What is the work done by this force in moving the body over half the circumference of the circle

1) $\frac{{m{v^2}}}{{\pi {r^2}}}$

2) Zero

3) $\frac{{m{v^2}}}{{{r^2}}}$

4) $\frac{{\pi {r^2}}}{{m{v^2}}}$

Solution:

Explanation: No Explanation

WEP Work Done by Constant Force

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