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24 July, 21:41

Calculate the period (T) of uniform circular motion if the velocity is 40.0 m/s and centripetal acceleration is 20.0 m/s2.

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  1. 24 July, 21:46
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    T is the time for a whole round.

    centripetal acceleration = V^2/R,

    20 = 40^2 / R, find R = 40^2/20 = 40*40/20 = 80 m, right?

    Now, one round is L = 2*pi*R = 2*pi*80 = 160*pi

    And T = L/v (distance/speed) = 160*pi/40 = 4*pi seconds, or ~ 12.57 s
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