The flywheel of a steam engine runs with a constant angular speed of 158 rev/min. when steam is shut off, the friction of the bearings and the air brings the wheel to rest in 2.6 h. what is the magnitude of the constant angular acceleration of the wheel in rev/min^2? do not enter the units.

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.