$($Figure $1)$Block $1,$ of mass m$1$

$=0\mathrm{.}700$ kg

$,$ is connected over an ideal $($massless and frictionless$)$ pulley to block $2,$ of mass m$2$

$,$ as shown. For an angle of $\backslash$theta

$=30\mathrm{.}0$

and a coefficient of kinetic friction between block $2$ and the plane of $\backslash$mu

$=0\mathrm{.}200,$ an acceleration of magnitude a

$=0\mathrm{.}400$ m$/$s$2$

is observed for block $2.$