The tub within a washer goes into its spin
cycle, starting from rest and reaching an angular
speed of 15π rad/s in 6.6 s. At this
point, the lid is opened, and a safety switch
turns off the washer. The tub slows to rest in
Through how many revolutions does the tub turn? Assume constant angular acceleration
while the machine is starting and stopping.
Answer in units of rev.