Moon Gravity
All masses produce a gravitational field. The larger the mass the stronger its gravitational field.
The strength of the Earth's gravity at its surface is 9.8 N/kg. This means that a mass of 1 kg will be attracted to the Earth with a force of 9.8 N.
The strength of the Moon's gravity at its surface is 1.6 N/kg. A mass of 1 kg will have a weight of 1.6 N on the Moon.
G (often referred to as "big G") is called Newton's Universal Gravitational Constant and is equal to 6.67 x 10-11 Nm2/kg2
Use the equation and the data in the table below to calculate the gravitational field strength of the bodies stated.
| Body | Mass (kg) | Radius (m) | g (N/kg) |
| Earth | 6.0 x 1024 | 6.4 x 106 | |
| Moon | 7.4 x 1022 | 1.74 x 106 | |
| Jupiter | 1.9 x 1027 | 71.5 x 106 | |
| Mars | 6.4 x 1023 | 3.4 x 106 | |
| The Sun | 1.99 x 1030 | 695 x 106 |