Astronomy & Space
Intermediate

Newton's Law of Gravitation

The attractive force between any two masses.

Formula

F=Gm1m2r2F = G\frac{m_1 m_2}{r^2}

Variables

GGravitational constant
m_1,m_2Masses
rSeparation

Example

Two 1000 kg masses 1 m apart ⇒ F ≈ 6.7×10⁻⁵ N

Did You Know?

Henry Cavendish "weighed the world" in 1798, measuring G with a delicate torsion balance in a sealed shed.

gravityforcenewton