Physics-
General
Easy

Question

A particle of mass m is moving along the x-axis with speed v when it collides with a particle of mass 2m initially at rest. After the collision, the first particle has come to rest and the second particle has split into two equal-mass pieces that are shown in the figure. Which of the following statements correctly describes the speeds of the two pieces? (theta > 0)

  1. Each piece moves with speed v    
  2. Each piece moves with speed v/2    
  3. One of the pieces moves with speed v/2, the other moves with speed greater than v/2    
  4. Each piece moves with speed greater than v/2.    

The correct answer is: Each piece moves with speed greater than v/2.

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