contacts the top of the cylinder A, the cylinder Just after the brake arm B in the figure is turning clockwise at 1000 rpm. The coefficient of kinetic friction between A and B is u = 0.3. Find how long it takes for A to come to rest under the constant force P = 40 kN. Consider the brake arm B to be in equilibrium (does not move). The total mass of the brake arm is 2 kg: 0.5 kg for the vertical part, and 1.5 kg for the horizontal part. The horizontal distance between Q and P is 0.401m (due to the width of the arm). Assume pins Q and O to be frictionless. For the cylinder A: Io = mr, with m mass and r radius. 0.2 m TOUST Brake arm B: cross section is 2 cm x 2 cm; 2 kg mass = 0.6 m- PI Cylinder A: mass= 10 kg; radius= 0.2 m