Question

Assertion(A): The gravitational force between two mases can be zero at some point between them. Reason(R): Gravitational force is a vector quantity, and forces due to two masses can cancel each other at some point.

Variation of graph with altitude The following graph shows how the gravitational acceleration g varies with altitude h from the surface of the earth.

The gravitational force of attraction between two mass m₁ and m₂ kept at a distance r from each other is F. What will be the gravitational force if m₁ is doubled, m₂ is halved and the distance between them is made thrice?

If the law of gravitation, instead of being inverse-square law, becomes an inverse-cube law-