A solid sphere of uniform density and radius R applies agravitational force of attraction equal to F

A solid sphere of uniform density and radius R applies agravitational force of attraction equal to F

3. A solid sphere of uniform density and radius R applies a gravitational force of attraction equal to F1 on a particle placed at A, distance 2R from the centre of the sphere. A spherical cavity of radius R/2 is now made in the sphere as shown in the figure. The sphere with cavity now applies a gravitational force F2 on the same particle placed at A.