# Angular velocity

• Dec 4th 2008, 03:48 PM
Joanie
Angular velocity
A truck driver travels at 60 mph. The truck tires have a diameter of 26 inches. What is the angular velocity of the wheels in revolutions per second?
• Dec 4th 2008, 04:09 PM
skeeter
Quote:

Originally Posted by Joanie
A truck driver travels at 60 mph. The truck tires have a diameter of 26 inches. What is the angular velocity of the wheels in revolutions per second?

60 mph = 1056 in/sec

r = 13 in

$\omega = \frac{v}{r}$

the above equation will get you the angular velocity, $\omega$ , in radians per second ... you'll have to convert it to revolutions per second ... note that there are $2\pi$ radians in one revolution.
• Dec 4th 2008, 04:23 PM
Joanie
Thank You.
Hi Skeeter--

Thanks so much. You have been very helpful.