Question with Solution

1 body is released at point P . How much time would it take to reach the lower surface of the cavity?

A small body of mass m is placed at a distance 2R above point P, on the dotted line extended upwards. What force does the planet exert on the body?

5 In the figure shown, the two tiny but heavy bodies having masses 'm' are initially very far away from each other. At the initial moment, they are imparted velocities ${\mathrm{v}}_0=\sqrt{\frac{\mathrm{Gm}}{\mathrm{L}}}$ as shown. Find their closest approach distance. The only force acting on them is their mutual gravitation attraction.