2. Page 4 of 6 SECTION B: ANSWER ALL QUESTIONS IN THIS SECTION IN THE ANSWER BOOKLET PROVIDED (80 MARKS) At the proportional limit, a 30 mm wide x 12 mm thick bar elongates 2.0 mm under an axial load of 41.5 kN. The bar is 1.5-m long. If Poisson's ratio is 0.33 for the material, determine: (a) the modulus of elasticity E (b) the proportional limit. (c) the change in each lateral dimension. (4 marks) (2 marks) (4 marks) aramic