Question

Two objects attract each other with a gravitational force of 50 newtons from a given distance. If the distance between the two objects is increased by 5 times, what will be the changed force of attraction between them

Answer 1

Gravitational force is inversely proportional to the square of the distance. So increasing the distance 5 times makes the gravitational force 1/25 of what it was. That's 2 Newton's.