| Acceleration |
the rate at which velocity is changing |
| Action force |
one of the pair of forces described in Newton’s 3rd law |
| Force |
a push or a pull |
| Interaction |
a mutual action between objects where the objects oppose each other’s force |
| Law |
A hypostasis that has been tested over and over and not contradicted |
| Newton's 3rd law |
When one body exerts a force on another it returns an equal and opposite reaction force |
| Mass |
a measure of objects inertia |
| Motion |
the movement of an object |
| Reaction force |
an force equal in strength but opposite in direction |
| Velocity |
an object’s speed and direction of motion |
| Weight |
the force on a body due to the gravitational attraction of another body |