angular velocity

Question

a truck driver travels at 58 miles per hour the truck tires have a diameter of 26 inches what is the angular velocity of the wheels in revolutions per minute

 

Answer 1

Using unit analysis:

 

(1 rev / 28π in) · (58 mi / hr ) · (1 hr / 60 min) · ( 63360 in / mi)

367488 rev / 1680π min

367488 rev / 5277.88 min

69.6 rev/min