" 2.Find "F_(m')-GMm[(1)/(r^(2))+(1)/(2r^(2))+(1)/(4r^(2))" ,"u,up

F=(Gm_1 m_2)/R^2 is valid

Write the proper answer in the square. "If "F=(Gm_(1)m_(2))/(d^(2))" then F = _____________"

Gravitational force, F=Gm_(1)m_(2)//r.

A mass M is split into two parts m and (M-m) which are then separated by certain distance. Find ratio (m/M) to maximise the gravitational force F=(Gm(M-m))/(r^(2)) between the parts. Here G = gravitational constant and r is the distance between m and (M-m).