Identify the case when an elastic metal rod does not undergo elongation
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Answer:
option is (C) correct it is allowed to fall freely
Explanation:
during free fall stress developed in the rod is zero, so there is no elongation.
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The only case in which there is no elongation is possible is in the free fall.
- During the free one property remain constant or we can say same at all points of rod or body that is in free fall state.
- That is the acceleration, as the acceleration is same at all points of the body or rod
- There is no elongation which means there is no change of force or there is no force acting on the body.
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