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Physics 1 RemCh2
review of chapter 2 vocab
| Question | Answer |
|---|---|
| speed | measure of how fast something is moving |
| instantaneous speed | how fast something is moving at any given moment |
| average speed | the distance covered divided by the time it took to cover it. |
| velocity | speed in a given direction |
| What is the average speed of a snail that travels 2 meters in 4 hours? | 0.5 m/h |
| What is the velocity of a mountain goat that travels 200 m north in 10minutes? | 20 m/minute north (remember velocities need a direction) |
| acceleration | the rate at which velocity changes |
| A gerbil that starts at rest and accelerates to a velocity of 1 m/s right. It takes it 10 seconds to reach this velocity. What is its acceleration? | 0.1 m/s2 |
| A rhino is traveling at a speed of 5 m/s. It travels for 10 seconds. How far does the rhino go? | 50m |
| A wildebeest is traveling at a velocity of 2 m/s south. It travels 200 meters. How long does it take the wildebeest to cover the distance? | 100 s South |
| A pumpkin starts at rest and is rolled down a ramp with an acceleration of 3 m/s2 down. If it accelerates for 2 seconds, how fast is it going? | 6 m/s down the ramp |
| free fall | motion under the influence of gravity only |
| air resistance | force that slows the acceleration of falling objects |
| An unconscious turtle is dropped from the top of the high diving board. It takes 1.2 seconds to hit the water below. How fast was it moving when it hit | 11.77 m/s |
| An unconscious turtle is dropped from the top of the high diving board. It takes 1.2 seconds to hit the water below. How far did it fall? | 7.06 m |
| Does air resistance increase or decrease the acceleration of a falling object? | decrease |
| How far will an object move in 1 second if its average speed is 4 m/s? | 4 m |
| Sue Subaru travels in her car in a straight line at a constant speed of 30 miles per hour. What is Sue's acceleration? | a = 0 since she is not turning nor changing speed |
| A dragster traveling at 10 m/s north increases its velocity to 25 m/s north in 3 seconds. What is its acceleration during this time period? | 5 m/s2 north |
Created by:
abolvin
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