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.
a) It makes one revolution every 3 seconds....so....it makes 20 revolutions every minute
b) The linear velocity is 2pi (5) ( 120 /360) = (10/3)pi inches per second