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A rod of length 6m has a mass of 12 kg. ...

A rod of length `6m` has a mass of `12 kg`. It is hined at one end of the rod at a distance of `3m` below the water surface.
a.What must be the weight of a block that is attached to the other end of the rod so that `5 m` of the rod's length is under water?
b. Find the magnitude and direction of the force exerted by the hinge on the rod. The specific gravity of the material of rod is `0.5.`

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