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A pulley is turned 120 degrees per second.

a. find the number of revolutions per minute (rpm)

b. if the radius of the pulley is 5 inches, find the linear velocity in inches per second

 Mar 22, 2018
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A full revolution is 360 degrees and since the pulley turns 120 degrees a second, it can fully revolve in 3 seconds. There are 60 seconds in a minutes, so 60/3 = 20 

 

20 revolutions a minute. 

 Mar 22, 2018

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