The gravitational potential energy of a body at a distance “r” from the centre of the earth is V. Its weight at a distance “2r” from the centre of the earth is : |
V/r V/2r V/4r 4V/r |
V/4r |
Gravitational potential energy (V) at a distance “r”; V = -(G*M*m)/r Gravitational force at a distance “r” = -(G*M*m)/r2 = V/r Gravitational force at a distance “2r” = -(G*M*m)/4r2 = V/4r. |