Physics-
General
Easy

Question

Three blocks are initially placed as shown in the figure. Block A has mass m and initial velocity v to the right. Block B with mass m and block C with mass 4m are both initially at rest. Neglect friction. All collisions are elastic. The final velocity of block A is

  1. 0.6v to the left    
  2. 1.4v to the left    
  3. v to the left    
  4. 0.4v to the right    

The correct answer is: 0.6v to the left

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