| A | B |
|---|
| Projectile | something that flies through the air |
| trajectory | path a projectile follows |
| horizontal speed of a projectile | stays the same (no gravitational effect) |
| Vertical speed of a projectile | increases (gravity speeds it up as it falls) |
| period | time to make one revolution |
| centripetal acceleration is directed where in circular motion | toward the center of the circle (an acceleration) |
| Centripetal force is directed where in circular motion | toward the center of the circle (a force) |
| Linear velocity is directed where in circular motion | tangent to the circle |
| if an object is traveling with centripetal acceleration and the cord breaks what direction will the object take | tangent to the circle at the point released |
| Torque | product of force and lever arm F X d (It is an angular force) |
| Torque is increased with | more force or longer lever arm |
| pendulum equation show that an object is dependent upon _______________? | the length of the pendulum only (gravity of the planet it is on) |
| During a baseball throw the speed is at a maximum | at the begining and end of the throw |
| During a baseball throw the speed is zero | at the top of the throw |
| During a baseball throw the vertical gravity is -9.81 | At the top middle and all points of the throw - IT NEVER STOPS |
| Vertical gravity effecting of a projectile is | -9.81 m/s/s |
| Horizontal gravity effecting a projectile is | 0 m/s/s (NO SUCH THING AS HORIZONTAL GRAVITY ON EARTH) |
| Simple harmonic motion (RESONANCE) | restoring force varies linearly with displacement. ex. fricitonless spring vibrating back and forth |
| At the top of a harmonic swing displacement is the ______________, velocity is the __________, and acceleration is the ____________ and opposite direction as the displacement. | greatest, least(zero), maximum to restore object back to equilibrium |
