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End A of the 6-kg uniform rod AB rests on the inclined surface, while end B is attached to a collar of negligible mass that can slide along the vertical rod shown. Knowing that the rod is released from rest when θ = 35° and neglecting the effect of friction, determine immediately after release (a) the angular acceleration of the rod, (b) the reaction at B.
Fig. P16.121 and P16.122
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