A $50\mathrm{.}0-$g Super Ball traveling at $30\mathrm{.}0\frac{m}{s}$ bounces off a brick wall and rebounds at $19\mathrm{.}5\frac{m}{s}.$ A high$-$speed camera records this event. If the ball is in contact with the wall for $5\mathrm{.}00ms,$ what is the magnitude of the average acceleration of the ball during this time interval?

$\frac{m}{s^2}$

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