# Do you know counting?

Three balls A,B,C ( $$m_a$$ = $$m_c$$ = 4$$m_b$$ ) 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.
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