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Causes of Friction

Which of the ...

Question

Which of the following is not a cause of friction?

A

Pressure acting between surfaces.

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B

Surface irregularity

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C

Area of contact

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D

Type of material

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Solution

The correct option is C Area of contact
Among the given options, area of the surface does not influence friction as long as the normal force acting is same. Roughness of surface and pressure acting along the surfaces causes more friction between moving objects. Friction also depends on the type of material involved.

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