The $5-lb$ collar is released from rest at A and travels along the smooth guide. Determine its speed when its center reaches point $C$ and the normal force it exerts on the rod at this point. The spring has an unstretched length of $12$ in $.,$ and point $C$ is located just before the end of the curved portion of the rod.

Ans. $v_c=12\mathrm{.}56f\frac{t}{s}$

$N_c=18\mathrm{.}93lb$