Find the gravitational potential energy of a body of mass 10 kg when it is on the earth's surface. [M(earth) `=6xx10^(24)kg,"R (earth)"=6.4xx10^(6)m, G=6.67xx10^(-11)N.m^(2)//kg^(2)]`

Explanation

` R = 6.4 xx 10^(6) m, ` m = 10 kg, M = ` 6 xx 10^(24) ` kg,
`= - (GMm)/R = - ( 6.67 xx 10^(-11) N.m^(2)// kg^(2) xx 10 kg)/ ( 6.4 xx 10^(6) m)`
` =- (6.67 xx 6)/( 6.4) xx 10^(8) J = - 6.253 xx 10^(8) J`