| A | B |
|---|
| balanced forces | when two forces are the same strength, but working in opposite directions |
| elastic | any substance that will return to its original shape and size after it has been stretched or squashed |
| gram | a unit for measuring mass |
| gravity | the force of attraction between any two objects |
| kilogram | a unit for measuring mass. There are 1000 g in 1 kg |
| mass | the amount of matter that something is made of. |
| newton | the unit of force |
| stationary | not moving |
| unbalanced forces | when two forces working in opposite directions are not the same strength |
| weight | the amount of force with which gravity pulls something towards Earth |
