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Question: Two 0.5 kg balls move away from each other, one traveling 6 m/s to the right, the other 6 m/s to the left. What is the magnitude of the total momentum of the system?
Momentum (p) is a product of mass (m) and velocity (v), meaning p = mv. For the first ball, p1 = 0.5kg * 6 m/s = 3 kg m/s to the right. For the second ball, p2 = 0.5kg * -6 m/s = -3 kg m/s to the left. The total momentum is the sum of the momentum of the individual balls. In this case, the magnitudes of their momentum are equal but in opposite directions. So, the total momentum of the system is 3 kg m/s (right) + (-3 kg m/s (left)) = 0 kg m/s. Hence, the magnitude of the total momentum of the system is 0 kg m/s.
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