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# Gravitational force as a fundamental force

The gravitational force $\vecphy{F}$ is the force of attraction between the masses of two or more bodies.

The gravitational force of a much larger mass (e.g. a planet) on a small mass (e.g. a human being) is called the weight of the smaller mass.

Like the other fundamental forces (electromagnetic, strong nuclear and weak nuclear forces), the gravitational force is a non-contact force. That means that bodies do not need to touch to have an impact on each other.

While the electric force can repel or attract, the gravitational force can only attract.

The gravitational force is the weakest of the fundamental forces. The electromagnetic force is $10^{36}$ times stronger than the gravitational force.

If the gravitational force was much stronger, the universe would quickly collapse as all mass attracts all other mass.

The unit of the gravitational force $\vecphy{F}$ (like that of other forces) is the newton $(\text{N})$.

The gravitational force causes these two masses to be attracted to each other.