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March 29, 2017

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4. The wheels on Devon’s bike have r-inch radii. After the front wheel picks up a tack, Devon rolls another d feet and stops. How far above the ground is the tack?

Then,(Continuation) How many degrees does the wheel turn for each foot that it rolls?

  • math/geometry - ,

    the angle he rolls is r/2PIr (in radians)
    is 180/pi * r/2PIr in degrees

    How high? What is r(1- cos theta?)

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