| A | B |
| Newton's second law of motion | a net force acting on an object causes the object to accelerate in the direction of the force |
| air resistance | the force air exerts on a moving object |
| terminal velocity | the highest velocity reached by a falling object |
| projectile | anything thrown or shot through the air |
| centripetal acceleration | acceleration toward the center of a path |
| centripetal force | force toward the center of a path |
| artificial satellite | human made devices that orbit the earth for a specific purpose |
| Newton's third law of motion | to every force, there is an equal and opposite force |
| momentum | a property a moving object has because of its mass and weight |
| law of conservation of momentum | the total amount of momentum of a group of objects does not change unles outside forces act on it |