Two spheres are placed so that their centers are 2.9 m apart. The force between the two spheres is 2.60 multiplied by 10-12 N. What is the mass of each sphere if one sphere is twice the mass of the other sphere?
Use the universal law of gravity.
F = G*M1*M2/R^2
If M1 is the heavier mass,
F = 2G*M1^2/R^2 = 2*10^-12 N
R = 2.9 m
Look up G and solve for M1