A force of 40 N is applied at the free end of a wire fixed at one end to produce an extension of 0.24 mm. If the original length and diameter of the wire art., 3 m and 2.0 mm respectively, calculate the: (a) stress on the wire; (b) strain in the wire.

Expertise

4 years ago

a) Stress = Force = F
Area A

= 40
3.14 (1.0 X 10-3)2
= 1.27 X 10-7 Nm-2
(b) Strain = Extemion or e
Length l
= 0.24 X 10-3
3
= 8.0 X 10-5