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Consider a system consisting of three particles: m1 = 4 kg, v1 = < 7, -6,...

Consider a system consisting of three particles:
m1 = 4 kg, v1 = < 7, -6, 14 > m/s
m2 = 7 kg, v2 = < -15, 4, -5 > m/s
m3 = 4 kg, v3 = < -23, 34, 19 > m/s

What is the translational kinetic energy of this system?

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