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Unit 2 projectile
Kin 330
| Question | Answer |
|---|---|
| A _________ is an object in free fall that is affected only by gravity and air resistance | Projectile |
| Gravity constantly accelerates objects _________ (Up or down) | Down |
| Once an projectile leaves the base it starts ____________ (slowing down or speeding up) until it reaches an ____________ | Slowing down; apex |
| Once a projectile hits the apex the acceleration ______________ (increases or decreases) and velocity _______________ (increases or decreases) | Decreases; increases |
| ___________ is the flight path of a projectile | Trajectory |
| ____________ is when an object becomes a projectile | Release |
| ___________ is the highest point of trajectory | Apex |
| _____________ velocity influences max vertical displacement | Vertical |
| _______________ velocity influences the apex | Vertcal |
| _____________ velocity is constantly changing due to gravity | Vertical |
| _____________ velocity influences horizontal displacement | Horizontal |
| Horizontal velocity remains ____________ | Constant |
| True or False: Vertical velocity and horizontal velocity are independent from each other | True |
| The magnitude of both vertical and horizontal velocity depends on _______________/___________ ________ | Projection/release angle |
| Vertical velocity at apex will always be ___m/s | 0 |
| _____________ is manipulation of body to maximize efficiency of physics | Technique |
| 1) relative height of release, 2) angle of release, and 3) velocity of release are factors that do what? | Influence projectile motion |
| Changing the ____________ of release changes how long vertical and horizontal velocities act on the projectile | Height |
| What do you want to change to change how much time the projectile spends in the air? | Height of release |
| Vh= | d/change in time |
| Increasing release height increases _________ _________ which then increases the distance the projectile goes | time down |
| When release height=landing height time to apex ___ time to land | = |
| When release height=landing height vertical velocity at release ____ vertical velocity at landing | = |
| When release height is higher than landing height vertical velocity at release is _______ than vertical velocity at landing | Less |
| When release height is greater than landing height time to apex is ______ than time to land | Less |
| When the release height is less than the landing height the time to apex is _____ than the time to land | Greater |
| When the release height is less than the landing height the vertical velocity at release is _______ than the vertical velocity of landing | Greater |
| Projection angle affects one, both, or neither vertical and horizontal velocities | Both |
| As a projectile reaches its apex the vertical velocity of the object is _________ | Decreasing |
| As a projectile leaves the apex and goes down the vertical velocity is _______________ in the _________ direction | increasing; negative |
| Increasing projectile height, ___________ flight time, _____________ horizontal displacement | Increases; Increases |
| You need a _________ (steep or smaller) projection angle to maximize vertical displacement | Steep |
| You need a ___________ (steep or smaller) projection angle to maximize horizontal displacement | Smaller |
Created by:
sschichtel