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1. 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 23, 2018
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120 degrees/sec  x  1 rotation/360degrees   x  60 sec/min = 20 rpm

 

CIRCUMFERENCE = pi x 2r = pi x 10 = 31.4 in

 

31.4 in/rotation  x  20  rotat/min = 628 in/min

628 in/min x 1min/60 sec= 10.47 in/sec

 Mar 23, 2018
edited by ElectricPavlov  Mar 23, 2018
edited by ElectricPavlov  Mar 23, 2018
edited by ElectricPavlov  Mar 23, 2018

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