Assuming the earth to be a sphere of uniform mass density, how much would a body weigh half way down to the centre of the earth if it weighed 250 N on the surface?
Weight of a body of mass m at the Earth’s surface, W = mg = 250 N
Body of mass m is located at depth,
Where,
= Radius of the Earth
Acceleration due to gravity at depth g (d) is given by the relation:
Weight of the body at depth d,