| A | B |
|---|
| terminal velocity | velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity |
| free fall | the motion of a body when only the force of gravity is acting on the body |
| projectile motion | the curved path that an object follows when thrown |
| vertical motion | the force of gravity pulling objects perpendicular to the ground |
| Inertia | the tendency of all objects to resist any change in motion |
| Momentum | depends on the object’s mass and velocity |
| 1st Law of Motion | An object at rest will remain at rest unless acted on by an unbalanced force. |
| 2nd Law of Motion | acceleration of an object depends on the mass of the object and the amount of force applied |
| 3rd Law of Motion | For every action there is an equal and opposite re-action. |
| An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. | 1st Law of Motion |
| Also known as Newton's first Law | inertia |
