-Determine the elongation of the steel bar 1m long and 1.5 cm cross-sectional area when subjected to a pull of 1500 kg. Take E=2*10 kg/cm ?

Please show all work! I'm seriously having trouble understanding this.

A copper rod with a diameter of 19 mm, modulus of 110 GPa, and a Poisson’s ratio of 0.35 is subjected to tension within the elastic region. Determine the force ( in N) that will produce a reduction of 0.003 mm in the diameter. I The answer is supposed to be 14,063 but im getting something else. Can you show how its supposed to be 14,063

Let's consider a rod having a solid circular cross-section with diameter of 5 mm and it is made of a material having a Young's modulus E = 200 Gpa and a Poisson's ratio of 0.3. If a tensile force F is subjected to that rod cross-section, the diameter becomes 4.995 mm. determine the applied force F. Select one: O F = 5236 N O F = 6283 N %3D O F= 13090N O F = 10472 N O F= 15708N OF=4189 N 9:22 PM EN ? 4/15/2021