2-57 할리데이 11판 솔루션 일반물리학

$$ \begin{cases} S&=1.20\ut{m}\\ v_1&=530\ut{m/s}\\ \end{cases} $$ $$ \begin{aligned} S&=\frac{1}{2}(v+v_0)t,\\ 1.2&=\frac{1}{2}(530+0)t\\ \end{aligned} $$ $$ \begin{aligned} t&=\frac{6}{1325}\ut{s}\\ &\approx 0.004528301886792453\ut{s}\\ &\approx 4.54\times10^{-3}\ut{s}\\ &\approx 4.54\ut{ms}\\ \end{aligned} $$