Four small disks A, B, C, and D can slide freely on a frictionless horizontal surface. Disks

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Four small disks A, B, C, and D can slide freely on a frictionless horizontal surface. Disks B, C, and D are connected by 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 the impact are vA = vB = (2.5 m/s)i, vC = vC i, and vD = vD i, determine

(a) The speeds vC and vD,

(b) The fraction of the initial kinetic energy of the system which is dissipated during thecollision.

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Vector Mechanics for Engineers Statics and Dynamics

ISBN: 978-0073212227

8th Edition

Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell

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