Question

what happens to the coefficient of friction when the normal reaction is halved? give reason for the answer

Answer 1

If the normal is doubled there will be no change in coefficient of friction, as it only depends upon the nature of pair of surface in contact. So doubling the normal will just double the frictional force and will not affect the coefficient of friction.

Answer 2

Answer:

The normal reaction has no effect on the coefficient of friction.

Explanation:

• The coefficient of friction is the ratio of the frictional force resisting the motion of two surfaces in contact to the normal force pressing the two surfaces together.

                                       $\mu=\frac{f}{N}$      (1)

Where,

μ=coefficient of friction

f=frictional force

N=normal reaction.

• The nature of the surfaces has no bearing on the coefficient of friction. It is unaffected by any other considerations, such as the relative speed of the surfaces or the contact surface area. So, even if we half the normal reaction the coefficient of friction will remain unaffected.

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