| A | B |
| Projectile | anything that is thrown or shot throught the air |
| curved paths | the path a projectile takes due to inertia and gravity |
| vertical motion | motion perpendicular to earth's surface |
| 9.8m/s2 | acceleration due to gravity |
| horizontal motion | motion parallel to the earth's surface |
| centripetal motion | motion towards the center |
| centripetal acceleration | acceleration towards the center of a curved path |
| centripetal force | the force that causes a moving object to move in a curved or circular path |
| free falling | objects that are falling towards earth due to the effects of gravity |
| weightlessness | being free from the effects of gravity |