| A | B |
|---|
| Friction | a force that opposes intended motion |
| Force due to gravity | Action-at-a- distance force example |
| Density | mass over volume |
| Weight | a measure of the force due to gravity |
| Mass | measures inertia |
| Inertia | propery of an object that resists a change in motion |
| Free fall acceleration | about - 10 m/s^2 |
| Normal force | force applied on a object by another object the acts perpendicular the the surface of the object |
| Applied force | a push or pull for example |
| Net force | the vector sum of all the forces on an object |
| Volume | a measure of how much space the object takes up |
