The tub of a washer goes into its spin-dry cycle at an angular acceleration of 2 rad/s2, starting from rest during 10 s. At this

Question

The tub of a washer goes into its spin-dry cycle at an angular acceleration of 2 rad/s2, starting from rest during 10 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 8 s. Through how many revolutions does the tub turn during this 18 s interval? Assume constant angular acceleration while it is stopping.

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