F = Gm1m2r2 M1=1024Kg, M2=1027Kg , r = 1020meters (Note: the gravitational constant of G = 6.67408×10−11Nm2∕kg2)
F = (6.67×10–11+24+27)1040=6.67×10401040 = 6.67N f = 6.67N