Physics

Problem

![](https://storage.googleapis.com/diraq-contents/question-bank/question-images/a2b55c4d93a2/2025_11_20_a8e88cb40012d192d3dfg-05.jpg) 17. A block of mass

m

is placed against the inner wall of a hollow cylinder of radius

R

that rotates about a vertical axis with a constant angular velocity

\omega

, as shown above. In order for friction to prevent the mass from sliding down the wall, the coefficient of static friction

\mu

between the mass and the wall must satisfy which of the following inequalities? (A)

\mu \geq m g

(B)

\mu \geq \frac{g}{\omega^{2} R}

(C)

\mu \geq \frac{\omega^{2} R}{g}

(D)

\mu \leq \frac{g}{\omega^{2} R}

(E)

\mu \leq \frac{\omega^{2} R}{g}

Browse the problem library