A particle of mass M is placed at the centre of a spherical shell of same mass and radius a. What will be the magnitude of the gravitational potential at a point situated at a/2 distance from the centre ?

Explanation

To find the gravitational potential at a point situated at a distance \( \frac{a}{2} \) from the center of a spherical shell of mass \( M \) and radius \( a \), we can follow these steps:

### Step 1: Understand the Gravitational Potential
The gravitational potential \( V \) at a distance \( r \) from a mass \( M \) is given by the formula:
\[ V = -\frac{GM}{r} \]
where \( G \) is the gravitational constant.
...