How exactly does s=1/2at² get rearranged into t = √2s/a? Thanks in advance
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$\displaystyle \displaystyle \begin{align*} s &= \frac{1}{2}a\,t^2 \\ 2s &= a\,t^2 \\ \frac{2s}{a} &= t^2 \\ \sqrt{\frac{2s}{a}} &= t \end{align*}$
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