Physics

Problem

A block just begins to slide down a rough inclined plane when the angle of inclination reaches

\theta_{\max}

. Which relation correctly gives the coefficient of static friction

\mu_s

in terms of

\theta_{\max}

? a)

\mu_s = \sin \theta_{\max}

\mu_s = \cot \theta_{\max}

\mu_s = \tan \theta_{\max}

\mu_s = \cos \theta_{\max}