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AP EAMCET201920 Apr 2019Morning ShiftPhysicsCenter of Mass, Momentum and CollisionActual

Two particles (P ) and (Q ) each of mass (3 ~m ) lie at rest on the ( X )-axis at points ((-a, 0) ) and ((+a, 0) ), respectively. A third particle (R ) of mass (2 ~m ) initially at the origin moves towards the particle (Q ). If all the collisions of the system of 3 particles are elastic and head on, the total number of collisions in the system is

Options

  1. A2
  2. B3
  3. C4
  4. D5

Correct answer

A. 2

Step-by-step solution

According to question, three particles are situated as shown below, ( ) All the collision of the system of 3 particles are elastic and head on. So, collision of R and Q, Hence, (R ) and (Q ) will never collide after 1 st collision. ( ) Total numbers of collision is 2.

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