Do you know counting?

Three balls A,B,C ( m a m_a = m c m_c = 4 m b m_b ) are placed on a smooth horizontal surface. Ball B collides with ball C with an initial velocity v as shown in figure . Total number of collisions between the balls will be?

Assumptions and Details

  • All collisions are elastic.
  • Balls A and C start at rest.
4 2 1 3

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