A Force of 15

Multiple Choice

A force of 15.0 N is applied to a wire with an unstretched length of 4.00 m and a diameter of 5.00 mm. If the wire changed length by 1.20 mm, then the strain in the wire is

A) 1.00 × 10⁻⁴.
B) 2.00 × 10⁻⁴.
C) 3.00 × 10⁻⁴.
D) 4.00 × 10⁻⁴.
E) 5.00 × 10⁻⁴.