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
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
- A
$\frac{{m{v^2}}}{r} \times \pi r$
- B
Zero
- C
$\frac{{m{v^2}}}{{{r^2}}}$
- D
$\frac{{\pi {r^2}}}{{m{v^2}}}$
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