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[" 1.Body "A" of mass "4m" moving with s...

[" 1.Body "A" of mass "4m" moving with speed "u],[" collides with another body "B" of mass "2m" ,"],[" at rest.The collision is head on and elastic "],[" in nature.After the collision the fraction of "],[" energy lost by the colliding body "A" is "],[[" (a) "5/9," (b) "1/9," (c) "8/9," (d) "4/9],[" (NEET "2019]]

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