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Projectile motion
| Term | Definition |
|---|---|
| When an object is in free-fall, its VERTICAL acceleration is always | g or 9.8 m/s2 near the surface of the earth. |
| its HORIZONTAL acceleration is always zero, meaning | Meaning the only equation you use for the horizontal motion is d = vt |
| If object is dropped vi= | 0 |
| If object is projected upwards it will slow down as it rises | The y-velocity will be zero at its heights point or peak. You can treat vf = 0 at the peak |
| Velocities in perpendicular directions add with the Pythagorean theorem, just like perpendicular forces. | |
| The magnitude of an object’s velocity is known as | speed |
| To approach a projectile problem, make two kinematics charts: | one vertical, one horizontal. |