A person pushes a block of mass m on a surface. Here, the friction force is defined as a function of velocity: Fk = −kv ∙ v = −kv ∙ dx dt

(1)Set up an equation of motion for the system above, i. e., differential equation for x(t):
(2)Solve the differential equation and obtain x(t). Here, F(t) = 0.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

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

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false