Newton's law (A-level only) Flashcards – AQA A-level Physics (7408)

What is gravity?

A universal attractive force between all matter.

What is Newton’s law of universal gravitation for two point masses? Define the symbols.

$F = \frac{Gm_1m_2}{r^2}$

$m_1$ and $m_2$ are the masses, $r$ is their separation, and $G$ is the gravitational constant.

How do the gravitational forces on two point masses compare in magnitude and direction?

They have equal magnitudes, with each force directed towards the other mass.