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  1. Two spheres of mass 15 kg and 20 kg, move along a straight line in the same direction with velocities of 20 m/s and 5 m/s, respectively. If the coefficient of restitution is 0.7, then the velocity of the 15 kg mass after collision will be

    2. A.
    5.43 m/s
    B.
    15.93 m/s
    C.
    18.72 m/s
    D.
    16.16 m/s

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    Answer : Option A

    Explanation :

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