Question

1. The force of attraction between two bodies at a
certain separation is 10 N. What will be the force
of attraction between them if the separation is
reduced to half ? Ans.40N
​

Answer 1

force of attraction is always inversely proportional to square of distance.

so F1/F2=(d2/d1)^2

10/F2=(1/2)^2

F2=40N

hope this helps you out.