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Question Details:
Four small disks A, B, C, and D can slide freely on a frictionless, horizontal surface. Disks B, C, and D are connectedby light rods and are at rest in the position shown when disk B is struck squarely by disk A which is moving to the right with a velocity v0=(12 m/s)i. The masses of the disks are mA=mB=mC=7.5 kg, and mD=15 kg. Knowing that the velocities of the disks immediately after impact are VA=0, VB=(3.5m/s)i, VC=(vc)i, and VD=(vD)i, determine (a) the speeds vc and vD (b) the fraction of the initial kenitic energy of the system which is dissipated during the collision.
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