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Question

A uniform plank of Young’s modulus Y is moved over a smooth horizontal surface by a constant horizontal force F. The area of cross-section of the plank is A. the compressive strain on the plank in the direction of the force is

A
FAY
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B
2FAY
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C
12(FAY)
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D
3FAY
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Solution

The correct option is A FAY
Compressive strain =StressYoungs modulus=FAY=FAY

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