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Relative Velocity

what does the...

Question

what does the slope of stress versus strain graph give?

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Solution

Slope of stress versus strain graph gives the value of coeff. of elasticty or modulus of elasticity of a body.

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Q. Assertion :The stress-strain graphs are shown in the figure for two materials

A

B

are shown in figure. Young's modulus of

A

is greater than that of

B

. Reason: The Young's modules for small strain is,

Y = \frac{s t r e s s}{s t r a i n}

= slope of linear portion of graph; and slope of

A

is more than that of

B

.

Q. The stress versus strain graphs for wires of two materials

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B

are as shown in the figure. If

Y_{A}

Y_{B}

are Young's moduli of the materials, then

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