If the mass of earth is M, radius R and G is universal gravitational constant then the workdone against gravity to move a body of mass 1 kg from the surface of earth to infinity will be

If the mass of earth is M, radius R and G is universal gravitational c

1.	If the mass of earth is M, radius R and G is universal gravitational constant then the workdone against gravity to move a body of mass 1 kg from the surface of earth to infinity will be
Answer» `sqrt((GM)/(2R))` `(GM)/R` `sqrt((2GM)/R)` `(GM)/(2R)` Solution :`implies` The POTENTIAL energy of 1 kg weight on the surface of earth . `=(-GM)/(R)` at INFINITY = 0 work = change in potential energy =` (GM)/R`