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March 24, 2017

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A race car starts from rest on a circular track of radius 565 m. The car's speed increases at the constant rate of 0.520 m/s2. At the point where the magnitudes of the centripetal and tangential accelerations are equal, find the following.
(a) the speed of the race car
m/s

(b) the distance traveled
m

( c) the elapsed time
s

  • Math - ,

    a) V^2/R = 0.520 m/s^2
    V = 17.141 m/s

    c) t = V/a = 32.963 s

    b) S = (V/2)*t = 282.51 m
    (measured along a circular arc)

    It will have completed 0.499 radians of the track, or about 28.6 degrees

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