Question

A panda with a mass $M$ lies without moving on a ramp that is inclined at $\theta$ degrees. The coefficient of static friction between the ramp and the panda is $\mu$.
What is the magnitude of the frictional force on the panda?

• A. $0$
• B. $Mg\sin \theta$
• C. $\mu Mg\sin \theta$
• D. $\mu Mg\cos \theta$
• E. $Mg\cos \theta$

Answer 1

The correct option is B $Mg\sin \theta$

The panda will not move on the plane when the friction force will be balanced by the force $Mg\sin \theta$ due to weight of the panda.

Thus, friction force, $f=Mg\sin \theta$

So, option B will be right.