Question with Solution

Gravitational field intensity in the cavity is same in magnitude and direction everywhere.

Gravitational field intensity in the cavity is $\frac{8\pi \mathrm{G}\rho \mathrm{R}}{9}$ at the centre.

Gravitational field intensity in the cavity is increasing with distance from the centre of the cavity.

A small body released at point P, will reach the lower surface of the cavity in time $\sqrt{\frac{4}{3\pi \mathrm{G}\rho }}$.