1. 36. (a) The Young’s modulus is given by
stress
E = = slope of the stress-strain curve
strain
2
150 × 106 N/m 2
= = 7.5 × 1010 N/m .
0.002
2
(b) Since the linear range of the curve extends to about 2.9 × 108 N/m , this is approximately the yield
strength for the material.