A body weighs 63 N on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to half the radius of the earth?
Weight of the body,W=63 N Acceleration due to gravity at height h from the Earths surface is given by the relation: g′=(1+Reh)2g Substituting h=Re/2, g′=4g/9 Weight of body of mass m at height h is given as: W′=mg′ =4/9 mg =4/9×63=28 N
