A car is moving at a rate of 28 MPH, and the diameter of the wheel is about 2 1/3 feet. A) Find the number of revolutions per minute the wheels are moving B) Find the angular speed of the wheels in radians per minute

1. Know that: (1) in 28 miles, there are 147,840 ft because 28*5280, (2) radius is 7/6 because that is (2 1/3) / 2, (3) C=2 (pi) (7/6) or pi*7:3 2. To find revolutions per minute, you take 147,840 and divide it by the circumference to get revolutions per hour, which is about 20168.11439. Then, divide this by 60 to find revolutions per minute: 336.1352398 revolutions/min. 3. Then, to find the angular measure in radians you take the revolutions per minute and multiply it by 2pi.