A wire of length L and cross-sectional area A is stretched an amount $\Delta$L by a force F.The strain is
A)$\Delta$L
B)$\Delta$L/L
C)F
D)F/A
E)FL/(A $\Delta$L)

Question

Quizplus · Accepted Answer

Strain is defined as the change in length (ΔL) divided by the original length (L). In this case, the change in length is F1F1F1S1ΔF1F1F1 and the original length is L. Therefore, the strain is (F1F1F1S1ΔF1F1F1)/L. Choice B is the only one that matches this expression.

A Wire of Length L and Cross-Sectional Area a Is Δ\DeltaΔ

A Wire of Length L and Cross-Sectional Area a Is $\Delta$