A wire has a strain of 0.10%. If the wire has an unstretched length of 5.00 m, then the change in length of the wire is
A) 5.0 mm.
B) 7.0 mm.
C) 9.0 mm.
D) 10 mm.
E) 15 mm.

Question

Quizplus · Accepted Answer

Strain is defined as the change in length divided by the original length. Therefore, a strain of 0.10% (or 0.001 in decimal form) on a 5.00 m wire results in a change in length of 0.001 * 5.00 m = 0.005 m, which is equivalent to 5.0 mm.

A Wire Has a Strain of 0