Gravity
Complete this table
| gravitational field strength (N/kg) | weight of a 1kg bag of sugar (N) | weight of a 100kg astronaut (N) | |
| on Earth | |||
| on the Moon | |||
| on Mars |
what is "big G"?
In 1797 Henry Cavendish designed an experiment to find an accurate value for G.
People said at the time that he was weighing the Earth. What did they mean?