Problem 11: The uniform slender bar of length I is released from rest in the horizontal position shown. a) Determine the value of x for which the angular acceleration will have the maximum magnitude at O this instant when the bar is horizontal. Ans: x = - 2V3 b) Using the value of x above, if the bar is let go from resting horizontal position (0 = 0), it will rotate down with O as the pivot. At what angle O will the bar start to slip at point O? The coefficient of friction between O and the bar is Us. Ans: tan (1/4)