Vector question. care travels around a track. .

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SUMMARY

A car travels around a track at a speed of 5 revolutions per second, starting with a radius of 35 meters and increasing by 5 meters per revolution. The problem requires expressing the speed and position of the car as functions of time in polar vector form. The solution involves assuming constant angular momentum and recognizing that the radius is a function of the angle, specifically increasing uniformly with each revolution.

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Homework Statement



a car travels around a track at a speed of 5 rev/s. the track begins with a radius of 35m and spirals such that the radius increases 5m/rev. give the speed and position of the car as functions of time. express your answers as polar vectors.



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The Attempt at a Solution



i don't get how to do it since the radius increases.
 
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How about assuming constant angular momentum?

And one knows r as a function of theta, assuming the radius increases uniformly as it sweeps through one revolution (2pi or 360°).
 

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