A small mass m is moved slowly from the surface of the earth to a height h above the surface. The work done (by an external agent) in doing this is (a) mgh for all values of h (b) mgh, for h lt lt R (c) (1)/(2) mgR , for h = R (d) -(1)/(2)mgR, for h = R

A small mass m is moved slowly from the surface of the earth to a heig

1.	A small mass m is moved slowly from the surface of the earth to a height h above the surface. The work done (by an external agent) in doing this is (a) mgh for all values of h (b) mgh, for h lt lt R (c) (1)/(2) mgR , for h = R (d) -(1)/(2)mgR, for h = R
Answer» only a & B are TRUE s only b & C are true only a & d are true all are true ANSWER :B