A force of 100,000 N is applied to a 10 mm x 20 mm iron bar having a yield strength of 400 MPa and a tensile strength of 480 MPa. Determine (a) whether the bar will plastically deform; and (b) whether the bar will experience necking.

A new high stiffness plastic material has a length of 19.7 inches and a thickness of 3 mm and is being considered for use as a bone fixation plate. When subjected to a tensile load of 10000 N, the material stretches to a length of 19.88 inches. Please find the width of this material, which has a modulus of 4 GPa.

A cylindrical specimen of some metal alloy having an elastic modulus of 101 GPa and an original cross-sectional diameter of 3.9 mm will experience only elastic deformation when a tensile load of 4633 N is applied. Calculate the maximum length of the specimen ( in mm) before deformation if the maximum allowable elongation is 0.31 mm.