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The ratio of frictional force to normal reaction is known as _______

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in Machine Kinematics by (38.0k points)
The ratio of frictional force to normal reaction is known as _______

(a) Coefficient of friction

(b) Coefficient of restitution

(c) Coefficient of inertia

(d) Coefficient of force

I have been asked this question during an interview for a job.

This key question is from Limiting Friction topic in portion Friction of Machine Kinematics

1 Answer

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by (106k points)
Right choice is (a) Coefficient of friction

To elaborate: The ratio of frictional force to the normal reaction at the surface of contact bears a constant ratio, this ratio is known as the coefficient of friction.

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