A 20-cm-long rod with a diameter of 0.250 cm is loaded with a 5000 N weight. If the diameter…

A 20-cm-long rod with a diameter of 0.250 cm is loaded with a 5000 N weight. If the diameter decreases to 0.210 cm, determine (a) the engineering stress and strain at this load and (b) the true stress and strain at this load.