14.47 Four small disks A, B, C, and D can slide freely on a friction- less 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 vo = (38.5 ft/s)i. The weights of the disks are W₁ = WB = Wc = 15 lb, and WD = 30 lb. Knowing that the velocities of the disks immediately after the impact are VA VB = (8.25 ft/s)i, vc = vci, and vp = ppi, determine (a) the speeds vc and up, (b) the fraction of the ini- tial kinetic energy of the system which is dissipated during the collision. == = A D B 3 ft 3 ft

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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14.47 Four small disks A, B, C, and D can slide freely on a friction-
less 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 vo = (38.5 ft/s)i. The weights of the disks
are W₁ = WB = Wc = 15 lb, and WD = 30 lb. Knowing that the velocities of
the disks immediately after the impact are VA VB = (8.25 ft/s)i, vc = vci,
and vp = ppi, determine (a) the speeds vc and up, (b) the fraction of the ini-
tial kinetic energy of the system which is dissipated during the collision.
=
A
D
B
3 ft
3 ft
Transcribed Image Text:14.47 Four small disks A, B, C, and D can slide freely on a friction- less 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 vo = (38.5 ft/s)i. The weights of the disks are W₁ = WB = Wc = 15 lb, and WD = 30 lb. Knowing that the velocities of the disks immediately after the impact are VA VB = (8.25 ft/s)i, vc = vci, and vp = ppi, determine (a) the speeds vc and up, (b) the fraction of the ini- tial kinetic energy of the system which is dissipated during the collision. = A D B 3 ft 3 ft
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