Question

when normal reaction is halved the coefficient of friction

Answer 1

THERE WON'T BE ANY CHANGE IN NORMAL REACTION AS

Fs ∞ N ||| ∞⇒DIRECTLY PROPORTIONAL

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Answer 2

Answer:

The correct answer  to the question is-"when normal reaction is halved the coefficient of friction" is-

When normal reaction is halved the coefficient of static friction is unchanged.

Explanation:

When normal reaction is halved the coefficient of static friction is unchanged. This is because-

The coefficient of friction is a property of the two surfaces in contact. If we double the normal force, we double the amount of friction, but the coefficient of friction is the same

, since the nature of the two surfaces in contact has not changed.

Friction proportional to normal reaction

• The coefficient of friction, µ, is a measure of the amount of friction existing between two surfaces.
• It depends upon the roughness or smoothness of the surfaces in contact and acts tangentially to the interface between them.
• It is independent of area and shape of surfaces in contact as long as the normal reaction remains the same.
• It is directly proportional to normal reaction 'R' between the two surfaces in contact.