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Question

The door of an almirah is 6 ft high, 1.5 wide 8 kg . The door is supported by two hings situated at a distance of 1 ft from the ends. If the magnitude of the forces exerted by the hinges on the door are equal, find this magnitude.

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Solution

Let force on each Hinge be f acting vartically.
From equilibrium in vertical direction,
2f=Mg
f=Mg2=8×102=40 N


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