The horizontal rod OA rotates about a vertical shaft according relation = 10t, where  and...

The horizontal rod OA rotates about a vertical shaft according relation = 10t, where  and t are expressed in rad/s and seconds, respectively. A 0.5-lb collar B is held by a cord with a breaking strength of 4-lb Neglecting friction, determine, immediately after the cord breaks, (a) the relative acceleration of die collar with respect to the rod, (b) the magnitude of horizontal force exerted on the collar by the rod.