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NTA Abhyas JEE Main2020PhysicsCenter of Mass, Momentum and CollisionPractice

A ball of mass m 1 is moving with velocity 3 v . It collides head on elastically with a stationary ball of mass m 2 . The velocity of both the balls become v after collision. Then the value of the ratio m 2 m 1 is

Options

  1. A1
  2. B2
  3. C3
  4. D4

Correct answer

B. 2

Step-by-step solution

3 m 1 v = m 1 v + m 2 v 3 m 1 v - m 1 v = m 2 v 2 m 1 v = m 2 v ∴ m 2 m 1 = 2

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