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A body of mass M at rest is struck by a ...

A body of mass M at rest is struck by a moving body of mass. Prove that the fraction of the initial kinetic energy of mass transferred to the struck body is `(4Mm)/((m+M)^(2))`

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30% of power `=W/t=(mgh)/t=(v rho gh)/t`
`30/100xP=(V rho gh)/t`
`:.P=43.6KW`
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