A sample of commercially pure aluminum 12.00 mm wide and 1.00 mm thick in the gage length section, and ...

A sample of commercially pure aluminum 12.00 mm wide and 1.00 mm thick in the gage length section, and 155.00 mm long that has gage markings 50.00 mm apart in the middle of the sample is strained so that the gage markings are 67.00 mm apart. Calculate (a) the engineering strain in percent elongation, (b) the engineering stress, (c) the applied force F, (d) the true strain, and (e) the true stress. The aluminum has a Young’s modulus of 69 GPa.