Problem 3 A signal e(t) = 4 sin 7t is applied to a sampler/zero-order hold device, with ωs = 4rad/s. (a) What is the frequency component in the output that has the largest amplitude? (b) Find the amplitude and phase of that component. (c) Sketch the input signal and the component of part (b) versus time. (d) Find the ration of the amplitude in part (b) to that of the frequency component in the output at ω = 7rad/s.

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.

What difference(s) did you notice using a pneumatic circuit over hydraulic circuit. explain why the pneumatic piston stumbles when it hits an obstacle.

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