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[" Three identical blocks "A" ,"B" and "C" are placed "],[" on horizontal frictionless surface.The blocks "],[B" and "C" are at rest.But "A" is approaching "],[" towards "B" with a speed "10m/s" .The coefficient "],[" of restitution for all collision is "0.5" .The speed "],[" of the block "C" just after collision is "],[" approximatoly "],[qquad (11)/(5.6m/s)quad " (b) "6.4mls],[" (c) "3.2m/squad " (d) "4.6mls]

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