A small 200-g collar C Review Problems can slide on a semicircular rod which is made to rotate…

A small 200-g collar C Review Problems can slide on a semicircular rod which is made to rotate about the vertical AB at the constant rate of 6 rad/s. Determine the minimum required value of the coefficient of static friction between the collar and the rod if the collar is not to slide when  Indicate in each case the direction of the impending motion.