| A | B |
|---|
| air resistance | opposes motion of a falling object near earth's surface |
| centripetal acceleration | acceleration toward the center of a circle |
| centripetal force | causes circular motion |
| isometric exercise | exerting muscles against muscles |
| law of conservation of momentum | unchanging nature of the total momentum of a set of objects |
| momentum | mass times velocity |
| Newton's second law of motion | force equals mass times acceleration |
| gravity | 9.8 m/s2 |
| acceleration | rate of change of velocity |
| mass | amount of matter in an object |
| force | a push or pull |
| terminal velocity | when acceleration due to gravity equals air resistance |
| projectile | anything thrown or shot |
| Newton's third law of motion | deals with action-reaction forces |
