Question

A rod OA of mass is held in horizontal position by a massless string AB as shown in figure. Length of the rod is . Find net force exerted by hinge on the rod. (g= )

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A

B

C

D

Hard

Solution

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Correct option is A)

Given,
Mass of the rod  =

Let tension due to the string be acting at an angle of °.
On resolving and balancing forces , we can calculate force acting by hinge on rod.

Let be the force acting by hinge along the rod.

Hence,
and

On solving and putting ,

We have,

solution
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Solve any question of Laws of Motion with:-

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