Physics WAEC

The limiting frictional force between two surface depends on?

I. the normal reaction between the surfaces

II. the area of surface in contact

III. the relative velocity between the surfaces

IV. the nature of the surface

A. I only
B. I & IV only
C. II only
D. III only

Correct Answer: Option B

B. I & IV only

Explanation

– Friction depends on the nature of the surfaces in contact

– Solid friction is independent of the area of the surfaces in contact and the relative velocity between the surfaces.

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