Homework Help: physics

Posted by matt on Thursday, September 20, 2007 at 4:40pm.

the tub of a clothes washer goes into its spin-dry cycle starting from rest and reaches an angular speed of 6.50 rev/s in 7.85 seconds. at this point, the person doing the laundry opens the lid, and a safety switch turns off the washer. the tub then slows to a stop in 15.07 seconds. Assuming a constant angular acceleration, while the tub is starting and stopping, how many revolutions does the tub turn during this 22.92 second interval?

oh god, could someone PLEASE help me with this question? please just dont tell me the answer, set me up with something comprehendable? any help is appreciated!!

physics - Keely, Thursday, September 20, 2007 at 4:50pm
6.50/2, times by 22.92.
physics - drwls, Thursday, September 20, 2007 at 4:59pm
Add the number of revolutions turned starting up to the number turned while slowing down. The easiest way do do this is to use the average spin rate, 3.25 rev/s (both while speeding up and while slowing down).

Total number of spins = 3.25 spins/s * (7.85 + 22.92)

Answer this Question

Related Questions

Physics - Ans in revs. The tub of a washer goes into its spin- dry cycle, ...
physics - The tub of a washer goes into its spin-dry cycle, starting from rest ...
physics help please - The tub of a washer goes into its spin-dry cycle, starting...
College Physic - The tub of a washer goes into its spin cycle, starting from ...
Physics - An automatic drier spins wet clothes at an angular speed of 4.8 rad/s...
physics - A disk rotates about its central axis starting from rest and ...
Physics - A centrifuge takes 100 s to spin up from rest to its final angular ...
physics - a clothes washer starts from rest and spins up with an angular ...
physics - drwls? - A disk rotates about its central axis starting from rest and ...
physics - During the spin cycle of a washing machine, the clothes stick to the ...

For Further Reading

First Name:
School Subject:
Answer: