Example

$-$ In the figure, a block weighing $17\mathrm{.}2$ N $,$ which can slide without friction on an incline at angle $\backslash (\backslash$theta$=35\mathrm{.}0^\{\backslash$circ$\}\backslash ),$ is connected to the top of the incline by a massless spring of spring constant $\backslash (125\backslash$mathrm$\{$~N$\}/\backslash$mathrm$\{$m$\}\backslash ).$ The block is initially at its equilibrium position. Then it is pulled down the incline by a short distance $\backslash ($ x $\backslash )$ and released. With what

$16$