1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution I missed a day at college last week when i was off sick due to tonsilitis. I recieved some homework today and it is going to be similar to a test next week. I really need to know how to do this and the lecturer has not been very helpful either. A) I have a rectangular cross-section bar that is, 100mm x 40mm square and 500mm long. This is subjected to an axial tensile load of 210kN. From this information i need to determine. 1) The axial strain. 2) The lateral strain. 3) The changes in cross sectional dimensions. The material has a modulus of elasticity 80GPa, and poissons ratio of 0.25. B) A bar of circular cross-section is subjected to a tensile load of 210kN, which is within the elastic range. The bar is made from a steel with 80GPa and Poissons ration = 0.25, it has a diameter of 25mm and 0.8m long. Determine the extension of the bar and the decrease in diameter.. Please give me as much help as you can as i am finding this very confusing, all help is appreciated.