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A heavy and uniform rod is hanging freely vertically from a fixed support. It is stretched by its own weight. Which of the following are incorrect about the diameter of the stretched rod?

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It is maximum in the middle

It is a largest at the top and gradually decreases down the rod

It is smallest at the top and gradually increases down the rod

It is uniform every where

answer is A, B, C.

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Detailed Solution

Because of its own weight, the load on the top of the rod is higher than at the lowest point.

So, diameter of rod is smallest at top and gradually increase down the rod.

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