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clarified the initial condition
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algori
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There are $n$ balls rolling along a line in one direction and $k$ balls rolling along the same line in the opposite direction. The speeds of the balls in the first group and in the second group are equal. AtInitially the two groups of balls are separated from one another and at some point the balls start colliding and the. The collisions are assumed to be elastic. How many collisions will there be?

There are $n$ balls rolling along a line in one direction and $k$ balls rolling along the same line in the opposite direction. The speeds of the balls in the first group and in the second group are equal. At some point the balls start colliding and the collisions are assumed to be elastic. How many collisions will there be?

There are $n$ balls rolling along a line in one direction and $k$ balls rolling along the same line in the opposite direction. The speeds of the balls in the first group and in the second group are equal. Initially the two groups of balls are separated from one another and at some point the balls start colliding. The collisions are assumed to be elastic. How many collisions will there be?

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algori
algori
  • 23.5k
  • 3
  • 100
  • 152

There are $n$ balls rolling along a line in one direction and $k$ balls rolling along the same line in the opposite direction. The speeds of the balls in the first group and in the second group are equal. At some point the balls start colliding and the collisions are assumed to be elastic. How many collisions will there be?