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= $\frac{1}{2}m{v}^2$

= $\frac{1}{2}\times$   $\mathrm{kg}$ $\times ($ $\mathrm{m}/\mathrm{s})$²

= 0.5   $\mathrm{J}$

= 5.00000 x 10^-1   $\mathrm{J}$   (to significant figures)

= ${\displaystyle \frac{2K}{v^2}}$

= 2   $\mathrm{kg}$

= 2.00000 x 10⁰   $\mathrm{kg}$   (to significant figures)

= ${\displaystyle \sqrt{\frac{2K}{m}}}$

= 1.4142135623730950488   $\mathrm{m}/\mathrm{s}$

= 1.41421 x 10⁰   $\mathrm{m}/\mathrm{s}$   (to significant figures)