Markowski Motion, Forces & Energy
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Created by:
missmarkowski on May 30, 2012
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16 terms
Terms | Definitions |
|---|---|
 acceleration | to change the speed or direction |
| force | gives energy to an object; a push or pull |
| gravity | the force of attraction that exists between all objects in the universe |
| friction | force that opposes the motion of an object |
| weight | mass times gravity m x g |
| speed | distance divided by time d / t |
| Law of conservation of mass | mass remains constant over time |
| a car traveling at a high rate of speed slows down. This is an example of: | acceleration |
| we are held to the Earth by the force of: | gravity |
| the opposing force between a car's wheels and the road is: | friction |
| a child pulling a wagon is an example of a: | force |
| an airplane travels 215 miles in 20 minutes. How many miles per minute does it travel? | 215 / 20 = 10.75 miles per minute |
| Newton | unit of measurement for weight |
| a person has a mass of 68 kg. What is his weight on Earth? *Gravity on Earth is 9.8 m/s2 | 68 x 9.8 = 666.4 Newtons |
| a car travels 85 miles in 1.25 hours. how many miles per hour does it travel? | 85 / 1.25 = 68 miles per hour |
| a person has a mass of 50 kg. What is her weight on Jupiter? *Gravity on Jupiter is 2.5 times greater than on Earth. | 9.8 x 2.5 = 24.5 (gravity on Jupiter) 50 x 24.5 = 1,225 Newtons |
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