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Standard XII

Physics

Longitudinal Strain

A uniform pla...

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

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Solution

The correct option is B. .
We know that,
Compressive strain $= \frac{S t r e s s}{Y o u n g^{'} s m o d u l u s} = \frac{\frac{F}{A}}{Y} = \frac{F}{A Y}$ .

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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

The correct option is B. .We know that,Compressive strain =StressYoung′s modulus=FAY=FAY.

The correct option is B. .
We know that,
Compressive strain $= \frac{S t r e s s}{Y o u n g^{'} s m o d u l u s} = \frac{\frac{F}{A}}{Y} = \frac{F}{A Y}$ .