Answer to Question #41098 in Mechanics | Relativity for Sanjeev

Question

A spherical hollow is made in a lead sphere of radius R such that its surface touches that the outside surface of the lead sphere and passes through the centre. The mass of the lead sphere before hollowing was M. The force of attraction that this sphere would exert on a particle of mass m which lies at distance d from the centre of the lead sphere on the straight line joining the centres of the sphere and the hollow is :-