A body projected vertically from the earth reaches height equal to earth’s radius before returning to the earth, The power exerted by the gravitational force is greatest

detailed solution

Correct option is A

'g' value is maximum on the surface of earth than at any height so power exerted by Force is greatest when the body hits the earthPower = . Power exerted by gravitational force is maximum when it is positive i.e. when θ = 00. i.e when the body is falling, also power is maximum, when 'g' is maximum on the surface of the earth. Therefore just before the body strikes the  surface of earth, power delivered by the gravitational force is maximum. So option (1) is right.