Equations of motion: Cylindrical Coordinates
Rod OA rotates counterclockwise with a constant angular velocity of theta dot = 5 rad/s. The double collar B is pin-connected together such that one collar slides over the rotating rod and the other slides over the horizontal curved rod, of which the shape is described by the equation r = 1.5(2-cos(theta)) ft. If both collars weigh 0.75 lb, determine the normal force which the curved rod exerts on one collar at the instant theta = 120 degrees, neglect friction.
