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106. 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)  F/(AY)                                          (b) (2F)/(AY)

(c)  1/2{ F/(AY)}                               (d) (3F)/(AY)

Answer-a

(6)

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