trig
posted by Kim .
How fast is a bicycle traveling in feet per second if a wheel has a 21in. diameter and the angular speed of the wheel is 33 radians per second? The speed of the bicycle is the same as the linear speed of a wheel.

A 21 inch diameter wheel had a radius of R = 10.5 cm. The speed in inches per second is R*(angular speed) = 346.5 inch/s = 28.9 ft/s.