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A system consists of three identical 5-kg particles A, B, and C. Their position vectors (in meter) and
velocity vectors (in m/s) are r, = (0,0,3), v, = v j,r, = (2,2,3), v, = v,i, and r. = (1,4,0). v. = v k,
respectively. Knowing that the angular momentum of the system about point O is H, = -1.5k kg m s,
determine (a) the velocities of the particles, (b) the angular momentum of the system about its center of
mass G.

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