Question

A particle is projected vertically upwards with velocity gr^1/2:where r is the radius of earth and g is

Answer 1

If the body of mass m is moved from the surface of earth to a point at distance h above the surface of

earth, then change in potential energy or work done against gravity will be

mgh/1+(h/R)

According to Law of Conservation of energy

Kinetic Energy=Change in Potential Energy

1/2 mv^2 =mgh/1+(h/R)