17 - An object with m1=3kg comes and goes with a speed of 10 m/s and collides with another m2=5kg object that is at rest. Since the collision is elastic, find the final velocity of the mass m1.    a) -1.4 m/s  B) -2.5 m/s  NS) 3m/s  D) +2.5 m/s  TO) +1.4 m/s

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