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Forces and Motion

Friction

Friction
Reading Level
     edHelper's suggested reading level:   grades 6 to 8
     Flesch-Kincaid grade level:   6.68

Vocabulary
     challenging words:    maglev, magnetism, feedback, negative, germany, leading, japan, coils, repel, gravity, fastest, public, difference, between, technology, tires
     content words:    United States

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Friction
By Sharon Fabian 		  
1     What is the difference between socks and sneakers? OK -- there are a lot of differences, but one difference is that sneakers have a lot more friction than socks. In your socks, you can get a running start and slide a long way down the hall. In your sneakers, you can get a running start and . . . stick to the floor!
 
2     Friction is the force that happens when two things rub together. The effect of friction is usually to slow you down. With less friction, you can move more easily. With more friction, you have to work harder to move the same distance, because the friction slows you down.
 
3     Friction can be useful. Sometimes you want sneakers that grip the floor. The friction caused by the soles of your sneakers is good for running track and for playing basketball. Friction is very useful on items such as snow tires.

Paragraphs 4 to 7:
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