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A vertical rectangular door with its centre of gravity at `O` (see figure) is fixed on two hinges `A` and `B` along one vertical length side of the door. The entire weight of the door is supported by the hinge `A`. Then the free body force diagram for the door (the arrows indicate the direction of the forces) is A. B. C. |
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Answer» Correct Answer - B Because of the W of door tries to rotate it clockwise, so, to oppose this normal at hinges produces anticlockwise torque. |
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