Question

When a body is lying on a rough inclined plane and does not move, the force of friction ____________.

• A. Is equal of $\mu R$
• B. Is less than $\mu R$
• C. Is greater than $\mu R$
• D. Is equal to $R$

Answer 1

The correct option is B Is less than $\mu R$

B) is less than μμR

SInce the body is not moving which shows that amount of friction that the plane can apply on the body has not yet reached the max value otherwise the body would have moved.