The car travels around the portion of a circular track having a radius of r = 500 ft such that when it is at point A it has a velocity of 4 ft/s , which is increasing at the rate of v˙=(0.004t)ft/s2, where t is in seconds. A-Determine the magnitude of the velocity when it has traveled three-fourths the way around the track. B-Determine the magnitude of the acceleration when it has traveled three-fourths the way around the track.

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.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

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