# trig

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How fast is a bicycle traveling in feet per second if a wheel has a 21-in. 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.

• trig -

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.

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