Consider a cylindrical nickel wire 2.0 mm in diameter and 3 × 104 mm long. Calculate its elongation when a load of 400 N is applied. Assume that the deformation is totally elastic. The Young’s modulus for nickel is 207 GPa. [4 points]

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise