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    Question

    For a perfectly elastic collision, the coefficient of

    restitution (eee) is
    A 1 Correct Answer Incorrect Answer
    B −1-1−1 Correct Answer Incorrect Answer
    D infinity Correct Answer Incorrect Answer

    Solution

    The coefficient of restitution (e) is defined as the ratio of relative velocity after collision to relative velocity before collision. For perfectly elastic collisions: e=1 For perfectly inelastic collisions, e=0. A negative or infinite e is not physically meaningful.

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