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 AFAY Compressive strain =StressYoung′smodulus=FAY=FAY