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Polishing Surfaces in Contact to Change Friction

Does the smoo...

Question

Does the smoothness of a surface reduce the friction force ?

A

Yes

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B

No

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C

Sometimes

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D

Depend on the amount of force appiled

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Solution

The correct option is A Yes
Friction is caused by the irregularities on the two surfaces in contact. Larger the irregularities, rougher the surface means more is the friction. Thus, the smoothness of the surface reduces the frictional force.

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