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A car starts from rest on a curve with a radius of 190 and accelerates at 0.300 . How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.00 ?

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    You should know by now that you have to include dimensions with your radius and acceleration numbers.

    If the tangential acceleration is always 0.300 (m/s^2?), the centripetal accleration (which is perpendicular to tangential) will be 1.98 m/s^2 when the total acceleration is 2.00 m/s^2. From that, you can figure out the instantaneous velocity and how long it took to reach that speed.

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