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Two balls marked 1 and 2 of the same mass m and a third ball marked 3 of mass M are arranged over a smooth horizontal surface as shown in figure. Ball 1 moves with a velocity v1 towards ball 2 and 3. All collisions are assumed to be elastic.
If M > m, the number of collisions between the balls will be:
- One
- Two
- Three
- Four
The correct answer is: Three
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