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Calculating Friction Using Coeffcients

A coefficient...

Question

A coefficient of friction more than unity means that the friction is stronger than normal force.

A

False

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B

True

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Solution

The correct option is B True

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Q. Assertion :The coefficient of friction can be greater than unity. Reason: The force of friction is dependent on normal reaction and the ratio of force of friction and normal reaction cannot exceed unity.

Can the coefficient of friction be more than one?

Q. The coefficient of friction can never be more than 1.

Q. Mark the correct statements about the friction between two bodies.
(a) Static friction is always greater than the kinetic friction.
(b) Coefficient of static friction is always greater than the coefficient of kinetic friction.
(c) Limiting friction is always greater than the kinetic friction.
(d) Limiting friction is never less than static friction.

Q. For most of the surfaces used in daily life, the friction coefficient is less than 1. Is it always necessary that the friction coefficient is less than 1?

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Calculating Friction Using Coeffcients

Standard XI Physics

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