Question

The kinetic energy needed to project a body of mass m from the eath surface (radus R) to infinity is

Answer 1

hope the answer will help you

Answer 2

If any object through with escaping velocity then the object will never come back at the ground, So we can assume it will reach at infinite distance.

If any object through with escaping velocity then the object will never come back at the ground, So we can assume it will reach at infinite distance.KE=21mvesc2=21m(2gR)2=mgR