Gravity

Gravity

The force by which a planet or other body draws objects towards it’s center

Newton’s law of gravitation

Any two point masses in the universe attract each other with a force that is directly proportional to the product of their masses, and inversely proportional to the square of the distance between them.

Things to know about Newtons law of gravitation

1. It is an example of an Inverse square law

2. The gravitational force is always attractive

3. The size of the force on each mass is the same

4. The value for the universal gravitation constant (G) is a constant and the same everywhere in the universe. (6.7 × 10^-11N m²/kg^-2)

Formula for Newton’s law of gravitation

Weight

Force due to gravity

Formula for the effect of gravity on the surface of a planet