what is the velocity of a car riding at 10 m/s after 4 seconds of experiencing a constant acceleration of 2 m/s? After these 4 seconds the car maintains a constant velocity. What is this velocity?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.