The tub of a washing machine goes into its spin cycle, starting from rest and gaining angular speed steadily for 6.00 s, at which time it is turning at 4.00 rev/s. at this point, the lid of the washing machine is opened, and a safety switch turns it off. the tub then smoothly slows to rest in 15.0 s. through how many revolutions does the tub rotate while it is in rev

Explanation:

As we know that initial angular speed of the tub was zero and then it increases uniformly to 4 rev/s in t = 6.00 s

so we will have

Now when the tub will comes to rest uniformly after opening the lid in time interval of t = 15 s

then we have

Now total angular displacement of the tub is given as

so number of revolutions is given as

a=d/t

a="triangle"v/t

explanation:

a = acceleration