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Q.

A uniform beam of weight W is attached to a vertical wall by a hinge H. The beam is held horizontal by a rope as shown below :

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Which one of the following best shows the direction of the reaction force R at the hinge?

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a

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b

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c

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d

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answer is A.

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Detailed Solution

For rotational equilibrium net torque about COM of beam should be zero and for translational equilibrium net force must be zero.

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A uniform beam of weight W is attached to a vertical wall by a hinge H. The beam is held horizontal by a rope as shown below :Which one of the following best shows the direction of the reaction force R at the hinge?