Question

A point mass $m_0$ is placed at a distance $\frac{R}{3}$ from the centre of a spherical shell of mass $M$ and radius $R$. The gravitational force on the point mass $m_0$ is:

• A. $\frac{9GM{m}_0}{R^2}$
• B. $\frac{GM{m}_0}{R^2}$
• C. Zero
• D. $\frac{4GM{m}_0}{R^2}$

Answer 1

The correct option is C Zero

By shell theorem, the gravitational force on any particle inside it is zero.

Therefore the answer to the above question is zero.