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A ball of mass m makes a perfect elastic head on collinsion with a second ball of mass M initially at rest. the second ball moves off with half the original speed of the first ball . (a) Express M in terms of m (b) Determine the fraction of original kinetic energyretained by the mass m, © Explain why this impact is elastic.

A ball of mass m makes a perfect elastic head on collinsion with a second ball of mass M initially at rest. the second ball moves off with half the original speed of the first ball .
(a) Express M in terms of m
(b) Determine the fraction of original kinetic energyretained by the mass m,
© Explain why this impact is elastic.

Grade:12

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