Question

An auto race is held on a circular track. A car completes one lap in a time of 19.2 s, with an average tangential speed of 39.8 m/s
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Oops!! Find the following......

(a) the average angular speed

(b) the radius of the track

(a) is 2pi / 19.2s = .327 rad/s
(b) .......

(b) radius=tangential speed/angular speed.
39.8/.327=121.7m

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