Question

Two objects of equal masses are at rest at a certain. If the distance between them is decreased by one fifth of the initial distance. Then what will be the change in force of attraction between the two objects

plz explain the answer......

Answer 1

The force acting between the 2 objects is the Gravitational attractive force. Now, gravitational force depends directly on the product of 2 masses and inversely upon the square of the distance between them i.e F=G(m1)(m2)/(r^2). So, since masses are kept constant, only the distance is changed. As force is inversely proportional to the square of the distance, on decreasing the distance by 1/5th, force will increase by 25 times.

I hope this will help you.