$!$

Required information

Problem $13\mathrm{.}026-$ Blocks resting on spring

A $\backslash (4\mathrm{.}500-\backslash$mathrm$\{$kg$\}\backslash )$ block rests on top of a $\backslash (2-\backslash$mathrm$\{$kg$\}\backslash )$ block supported by$,$ but not attached to$,$ a spring of constant $\backslash (40\backslash$mathrm$\{$~N$\}/\backslash$mathrm$\{$m$\}\backslash ).$ The upper block is suddenly removed.

Problem $13\mathrm{.}026.$a $-$ Speed achieved by a block resting on a spring

Determine the maximum speed reached by the $\backslash (2-\backslash$mathrm$\{$kg$\}\backslash )$ block. $($Round the final answer to three decimal places.$)$

The maximum speed reached by the $2-$kg block is $\backslash (\backslash$mathrm$\{$m$\}/\backslash$mathrm$\{$s$\}\backslash ).$