Four smooth steel balls of equal mass at rest are free to move along a straight line without friction. The first ball is given a velocity of . It collides head on with the second elastically, the second one similarly with the third and so on. The velocity of the last ball is |
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a) |
b) |
c) |
d) |

Four smooth steel balls of equal mass at rest are free to move along a straight line without friction. The first ball is given a velocity of . It collides head on with the second elastically, the second one similarly with the third and so on. The velocity of the last ball is |
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a) |
b) |
c) |
d) |

1 Answer

127 votes

In head on elastic collision velocity get interchanged (if masses of particle are equal) the last ball will move with the velocity of first ball |

127 votes

127