Answer 16.5
From Mechanics
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| - | <math>\frac{4}{3}</math> <math>\text{m}{{\text{s}}^{-1}}</math>,  in the  | + | <math>\frac{4}{3}</math> <math>\text{m}{{\text{s}}^{-1}}</math>,  in the same direction as before the collision. | 
Current revision
\displaystyle \frac{4}{3} \displaystyle \text{m}{{\text{s}}^{-1}}, in the same direction as before the collision.
 
		  