Figure shows a spherical cavity inside a lead sphere. The surface of the cavity passes

Figure shows a spherical cavity inside a lead sphere. The surface of the cavity passes

Figure shows a spherical cavity inside a lead sphere. The surface of the cavity passes through the centre of the sphere and touches the right side of the sphere. The mass of the sphere before hollowing was `M`. With what gravitational force does the hollowed out lead sphere attract a particle of mass `m` that lies at a distance `d` from the centre of the lead sphere on the straight line connecting the centres of the spheres and of the cavity.