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Question
AB and CD are two uniform and identical bars of mass 10 kg each, as shown. The hinges at A and B are frictionless. The assembly is released from rest and motion occurs in the vertical plane. At the instant that the hinge B passes the point B', the angle between the two bars will be
AB and CD are two uniform and identical bars of mass 10 kg each, as shown. The hinges at A and B are frictionless. The assembly is released from rest and motion occurs in the vertical plane. At the instant that the hinge B passes the point B', the angle between the two bars will be
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Solution
The correct option is C 30 degrees
As weight and hinge reaction passes through the center of mass and hinge is frictionless, the rod CD will not rotate. The CD rod will make the same angle 30∘ with vertical.
30 degrees
As weight and hinge reaction passes through the center of mass and hinge is frictionless, the rod CD will not rotate. The CD rod will make the same angle 30∘ with vertical.
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