| Term | Definition |
| terminal velocity | the constant velosity of a falling object when the force of air resistence and magnitude are equal |
| free fall | the motion of a body when only gravity is acting on it |
| projectile motion | curved path that an object follows when thrown |
| newton's first law | an object at rest stays at rest until an unbalanced force acts upon it; an object in motion stays in motion until a bablanced force acts upon it |
| newton's second law | the acceleration of an object depends on the mass and the amount of force applied |
| Newton's third law | where there is an action there is a reaction |
| inertia | the tendency of an object to resist change |