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 Projectile Motion | the curved path of a thrown object near Earth's surface |
| Weight | a measure of the gravitational force exerted on an object |
| Orbit | the path of one object around another in space |
| Centripetal Force | an unbalanced force that causes objects to move in a circular path |
| Free Fall | the motion of a body when only gravity acts on it |
| Mass | a measure of the amount of matter in an object |
| Gravity | a force of attraction between objects that is due to their masses and the distance between the objects |
| Terminal Velocity | the constant velocity of a falling object when the force of gravity is balanced by air resistance |
| Air Resistance | the force that opposes the motion of objects through air |