This is an attractive force between any two objects due to mass.

Gravity

Explanation:

Isaac Newton was the first to explain that the force that causes objects to fall with constant acceleration on Earth (Earth's gravity) is the same that keeps the planets and stars moving.

The force of gravity is always attractive, never repulsive and has infinite reach. However far apart two bodies are from each other, they continue to experience this force, although weaker as the distance increases.

The force of gravity always produces attraction between bodies, whatever their composition. The resulting force is produced by attracting the center of gravity of an object with the center of gravity of the other.

The gravitational force is universal and all material particles are subject to it, without exception. However, inside the atoms, the force of gravity does not play an important role, due to the very small magnitude of the elementary particle masses.

volleyball players can not touch the net while the ball is in play