Posted by **Alyssa** on Tuesday, November 13, 2012 at 7:42pm.

The tub of a washer goes into its spin-dry

cycle, starting from rest and reaching an angular speed of 2.9 rev/s in 8.5 s. At this point

the person doing the laundry opens the lid, and a safety switch turns oﬀ the washer. The tub slows to rest in 11.6 s.

Through how many revolutions does the

tub turn? Assume constant angular acceleration while it is starting and stopping.

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