Starting from rest when 0-0, arm 04 rotates with a clockwise angular velocity (15)rad/s. Determine the force arm OA exerts on the smooth 2kg cylinder B when 0-45° Hint: Let clockwise be (+)! Keep 8, co, and a all positive. Write B, a, and a as functions of t, but since 0 x/4, solve for t. Express 0. oo, and a numerically! B 1.2m