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The ratio of magnitude of the kinetic friction to the normal reaction between the two surfaces is_____________ than that in case of limiting friction.

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in Machine Kinematics by (38.0k points)
The ratio of magnitude of the kinetic friction to the normal reaction between the two surfaces is_____________ than that in case of limiting friction.

(a) greater

(b) less

(c) equal

(d) none of the mentioned

This question was posed to me at a job interview.

My question is based upon Laws of Solid Friction and Limiting Friction in chapter Friction of Machine Kinematics

1 Answer

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by (106k points)
The correct choice is (b) less

The best explanation: The magnitude of the kinetic friction bears a constant ratio to the normal reaction between the two surfaces. But this ratio is slightly less than that in case of limiting friction.

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