Coefficient of friction is the

Coefficient of friction is the

Right Answer is:

Ratio of limiting friction and normal reaction

SOLUTION

The coefficient of friction is the ratio of limiting frictional force F to the normal reaction R between the two surfaces. It is denoted by µ.

µ = F/R

The coefficient of friction is of three types namely coefficient of static friction µs, coefficient of kinetic or dynamic friction µk, and coefficient of rolling friction µr.

(i) For the same two surfaces, µs > µk> µr

(ii) Limiting friction is the maximum value of static friction.

(iii) The force of friction always acts parallel to the surfaces in contact.

(iv) The force of friction F is equal to applied force if it is less than or equal to µr.

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