Question (31 (30 pts.] 0.8 m O А B ө The horizontal rod OA rotates about a vertical shaft according to the relation d =

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Question (31 (30 pts.] 0.8 m O А B ө The horizontal rod OA rotates about a vertical shaft according to the relation d = 20t, where è and t are expressed in rad/s and seconds, respectively. A 400-g collar B is held by a cord with a breaking strength of 30 N. You are required to: a. [5 Pts) Based on the following requirements, identify this kind of dynamic problem including the motion of the collar after the breaking of the cord and your strategy for solution. b. [5 Pts) Model the collar and formulate the kinetic relations of its motion (show the FBD and the KD). c. [10 Pts) Apply Newton's second law to determine the relative acceleration of the collar with respect to the rod, immediately after the cord breaks. d. [10 Pts) Apply Newton's second law to determine the magnitude of the horizontal force exerted on the collar by the rod, immediately after the cord breaks. You can assume that there is no friction between collar B and the rod OA.