# A particle is moving in a circular path

Question:

A particle is moving in a circular path of radius a under the action of an attractive potential $\mathrm{U}=-\frac{\mathrm{k}}{2 \mathrm{r}^{2}}$. Its total energy is :-

1. $\frac{k}{2 a^{2}}$

2. Zero

3. $-\frac{3}{2} \frac{\mathrm{k}}{\mathrm{a}^{2}}$

4. $-\frac{\mathrm{k}}{4 \mathrm{a}^{2}}$

Correct Option: , 2

Solution: