A 7 kg ball and a 9kg ball are 4 m apart what is the force of gravity that they exert on each other?

2.6263125e-10

(.00000000026263215)

F=G*m1*m2/d2

So the force is Newton's constant of gravity (G) of 6.674 28 x 10-11 m3 kg-1 s -2 times mass one (m1) and mass two (m2) divided by the distance (d) squared.