A thin rod of length $L$ is bent to form a semicircle. The mass of rod is $M.$ What will be the gravitational potential at the centre of the circle?
A thin rod of length $L$ is bent to form a semicircle. The mass of rod is $M.$ What will be the gravitational potential at the centre of the circle?
- A
$-\frac {GM}{L}$
- B
$ - \frac{{GM}}{{2\pi L}}$
- C
$ - \frac{{\pi GM}}{{2L}}$
- D
$ - \frac{{\pi GM}}{{L}}$
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