А AE The Closs-sectional
and of a fan
is given by (14 x ²200) eme where
xem i the dulance from one od
Find the extension anda
load of 20kN on a longth of
loem. Take E= 2000ha.
The cross sectional area of a bar is given by (1+x^2/100)cm^2 where xcm is the distance from one end. Find the extension under a load of 20KN on a length of 10cm take Young’s modulus of 200Gpa

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

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