$(6)$ The pin follows the path as shown in the

$(6)$

figure. When $=50$ the acceleration of the $p$ in is given by $a=-0\mathrm{.}250u_r+0\mathrm{.}0356u_{}.$ The $x-$component of the acceleration $($in $\frac{m}{s^2})$ is:

$($C$)$

$($D$)$

$($E$)$