gravitational potential energy is given by formula
here we need to compare the gravitational potential energy of stone 2 with respect to stone 1
so we will say
given that
now we have
If a person is placed in a large, hollow, metallic sphere that is insulated to the ground and a charge is placed on sphere, the person inside will not be harmed.
The pull of the moon on Earth's tidal bulge is causing The moon to slowly move farther away from the Earth. Hope that helps.
Fc=mv2/r formula of centripetal force will be applied here with radius mass and velocity described in the above question