E_{k} = \frac{m v^{2}}{2} \Rightarrow v = \sqrt{\frac{2 E_{k}}{m}} = \sqrt{\frac{2 \cdot 3, 92 J}{0, 1 k g}} = 8, 85 m / s \approx \underline{\underline{9 m / s}}

${E_k = \frac{mv^2}{2} \Rightarrow v = \sqrt{\frac{2E_k}{m}} = \mathrm{\sqrt{\frac{2 \cdot 3,92\, J}{0,1\, kg}} = 8,85 m/s \approx \underline{\underline{9\, m/s}}}}$

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