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Veronika [31]
4 years ago
11

If a metal wire is 4m long and a force of 5000n causes it to stretch by 1mm, what is the strain?

Physics
1 answer:
barxatty [35]4 years ago
5 0

Answer:

2.5\cdot 10^{-4}

Explanation:

The strain is defined as the ratio of change of dimension of an object under a force:

S=\frac{\Delta L}{L_0}

where

\Delta L is the change in length of the object

L_0 is the original length of the object

In this problem, we have L_0 = 4 m and \Delta L=1 mm=0.001 m, therefore the strain is

S=\frac{\Delta L}{L_0}=\frac{0.001 m}{4 m}=2.5\cdot 10^{-4}


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