Question

Always an attractive force is acted between two bodies and this force depends upon the masses of the bodies and the distance between them. This force is:

• A. inertia
• B. unbalanced forces
• C. action and reaction force pair
• D. universal gravitation
• E. restoring force

Answer 1

The correct option is D universal gravitation

Newton's gravitational law states that there is always an attractive force between two bodies in universe and this force is directly proportional to the product of masses of two bodies and inversely proportional to square of the distance between the bodies ,this force is called universal gravitational force

$F\propto \frac{m{m}^{\prime }}{r^2}$

where $m$ and $m^{\prime }$ are the masses of bodies and $r$ is the distance between them.

therefore the given condition describes the universal gravitation.