| A | B |
|---|
| air resistance | fluid friction that opposes the motion to objects through the air |
| terminal velocity | the constant velocity of a falling object when the size of the upward force of air resistance matches the size of the downward force |
| free fall | the condition an object is in when gravity is the only force acting on it |
| centripetal force | an unbalanced force that causes objects to move in a circular path |
| projectile motion | the curved path an object follows when thrown or propelled near the surface of the Earth |
| Newton's First Law of Motion | an object at rest remains at rest and an object in motion remains at motion unless acted upon by an unbalanced force |
| inertia | the tendency of all objects to resist any change in motion |
| Newton's Second Law of Motion | the acceleration of an object depends on the mass of the object and the amount of force applied |
| Newton's Third Law of Motion | whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first |
| momentum | a property of moving objects that depends on the object's mass and velocity |
