# Question

A fellow student states that the total momentum of a three-particle system (m1 = 0.25 kg, m2 = 0.20kg, and m3 = 0.33kg) is initially zero. He calculates that after an inelastic triple collision the particles have velocities of 4.0 m/s at 0o, 6.0 m at 120o, and 2.5 m/s at 230o, respectively, with angles measured from the + x-axis. Do you agree with his calculations? If not, assuming the first two answers to be correct, what should be the momentum of the third particle so the total momentum is zero?

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