| A | B |
|---|
| Air Resistance | Friction that acts on objects as they fall through the air. |
| Fluid Friction | Frictions that acts on objects moving in a fluid. |
| Force | Push or a pull on an object. |
| Friction | A force that opposes motion. |
| Gravity | A force that acts between two masses. |
| Inertia | The tendency of an object to resist change in motion. |
| Law of Conservation of Momentum | In a closed system all momentum is conserved. |
| Mass | The amount of matter an object contains. |
| Momentum | Product of an objects mass and velocity. |
| Net Force | The overall force acting on an object when all forces are combined. |
| Newton | The SI unit for used to measure force. |
| Projectile Motion | The motion of falling objects after it has been launched by a force. |
| Rolling Friction | Frictions that acts on rolling objects. |
| Sliding Friction | Friction that acts on moving objects. |
| Static Friction | Friction that acts on objects not moving. |
| Terminal Velocity | A constant velocity of a falling object when the force of air resistance equals the force due to gravity. |
| Weight | The force due to gravity acting on an object. |
