Question

Length of a wire is 5 m. When a force is applied, its length changes by 3 mm. Calculate strain in wire.

Answer 1

Answer:

Longitudinal Strain is ratio of change in length to original length. Wire is stretched to double it's original length. Hence change in length = 2×L - L (where L is original length. ) Therefore change in length is L.

Hence strain = L/L = 1

Stain dont have any unit.

In this case Young's modulus is equal to stress .

Hope this may help.

Explanation:

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Answer 2

Answer:

Length of a wire is 5 m. When a force is applied, its length changes by 3 mm. Calculate strain in wire.