Afree falling rock is released at an altitude of 50 m. earth's gravity g = 9.81 m/s^2 is the only force acting upon the rock. (i. e. no atmospheric drag). plot the altitude, velocity, and acceleration as a function of time (4 seconds in 0.05 second steps) in one figure using the "subplot" function. in a second figure plot the velocity as a function of the altitude.

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