A top-loading washing machine has a cylindrical tub that rotatesabout a vertical axis. The tub of one such machine starts from restand reaches an angular speed of 2.0 rev/s in 7.0 s. The lid of themachine is then opened, which turns off the machine, and the tubslows to rest in 11.0 s. Through how many revolutions does the tubturn during this 18 s interval? Assume constant angularacceleration while it is starting and stopping.
