| A | B |
|---|
| Friction | a force that opposes intended motion |
| Force due to gravity | action-at-a- distance force example |
| Density | mass divided by 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 |
| Equilibrium | net force equals zero |
| Tension | the force transmitted by a rope or string |
| Force opposing thrust | drag |
| Newton | The SI unit for force. |
| Gravity | a force that acts toward the center of the Earth |
| Galileo | One of the first scientists to perform experiments with the motion of objects |
| Aristotle | Incorrectely proposed that moving objects require a force to keep them moving |
| m/s/s | Units for acceleration |
| Acceleration | the result of unbalanced forces |
| Terminal velocity | Reached when air resistance balances weight |
| Displacement | The vector difference between final and initial positions |
| Free body diagram | Vector sketch |
| Scalars | Examples include: mass, area and volume |
| Resultant | The combination of two or maore vectors |
