for the equation y = y0 + vy0t +
at^2/2, how to I get t alone. Im looking to slove for time

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  1. If you know the location (y) and have to solve for time, you must solve a quadratic equation.

    You probably learned how to do that in algebra class.

    (a/2)t^2 + vy0*t + (y0 - y) = 0

    Let a/2 = A; vy0 = B and y0 - y = C

    t = [-B +/-sqrt(B^2 -4AC)]/2A

    Of the two answers, take the one that gives you a positive value for t.

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