The coefficient of static friction between the slider and the rod is u=0.2. The inclined rod rotates about a vertical axis AB with a constant angular speed, w, as shown in Figure. At the instant shown, the slider is positioned at 0.6 m from B. (i) What is the acceleration of slider P if it does not slide on the rod? (ii) Determine the maximum angular speed the rod can have so that the slider P does not slip up the rod. Draw a free body diagram of the slider showing all the forces acting on it in the vertical plane ABC. (iii) If the angular speed of the rod increases at a rate of 10 rad/s^2 at the instant shown, before the slider starts to slip, what is the tangential contact force exerted by the rod on the slider? Note: Answer should be: (i) 0.52w^2 (ii) 4.07 rad/s (iii) 5.2 N The diagram - http://pdfcast.org/pdf/circular-motion-3 [Broken] I understand that we must come up with an equation showing the forces acting along BC and another showing the forces acting along the normal of BC. But can anyone explain to me why the normal force acting on the slider isn't mgsin60? My tutor has explained the question in class but he didn't elaborate on this part.