A system consists of three identical 9-kg particles A, B, and C. The velocities of the particles are, respectively, vA = vAj, vB = vBi, and vC = vCk. Knowing that the angular momentum of the system about O, expressed in kg ?? m2/s is HO = ??1.8k, determine (a) The velocities of the particles, (b) The angular momentum of the system about its mass center G.

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0,6 m 0.6 m B OF No 1.2 m 0.3 m0.9 m