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Frictional and Normal Force

People slide ...

Question

People slide faster on ice rinks, due to:

A

More friction

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B

Less friction

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C

More gravity

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D

Less gravity

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Solution

The correct option is B
Less friction

Friction is a type of contact force that opposes motion. Since friction is very less on an ice rink, people slide faster.

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Q. In an ice rink a skator is moving at

3 m s

^{- 1}

and encounters a rough patch that reduces her speed by

45 %

due to a friction force that is

25 %

of her weight. Find the length of the rough patch.

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Frictional and Normal Force

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