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.
+36915 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
