Two cars $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ have a mass of $2\mathrm{.}0$ Mg and $1\mathrm{.}4$ Mg $,$ respectively.

Determine the magnitudes of $\backslash (\backslash$mathbf$\{$v$\}\_\{$A$\}\backslash )$ and $\backslash (\backslash$mathbf$\{$v$\}\_\{$B$\}\backslash )$ if the cars collide and stick together while moving with a common speed of $\backslash (50\backslash$mathrm$\{$~km$\}/\backslash$mathrm$\{$h$\}\backslash )$ in the direction shown.$($Figure $1)$ Enter your answers numerically separated by a comma.

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