Question $5$

$4$ Points

The pendulum in the diagram below has a mass $5\mathrm{.}5$ kg which hangs vertically on a light rod pivoted at $($O$).$

The mass and rod of length $3\mathrm{.}6$ m is pulled back to form an angle of $32$ to the horizontal surface $(0)$ and then released with an initial velocity of $2\mathrm{.}7\frac{m}{s}.$

Calculate the velocity of the mass when it reaches the lowest point $($directly below O $).$

ANSWER MUST BE IN km$/$h$.($Do not include $k\frac{m}{h}$ in your answer$)$