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JEE Main20249 Apr 2024Evening ShiftPhysicsNuclear PhysicsActual

A nucleus at rest disintegrates into two smaller nuclei with their masses in the ratio of 2: 1 . After disintegration they will move :

Options

  1. Ain the same direction with same speed.
  2. Bin opposite directions with the same speed.
  3. Cin opposite directions with speed in the ratio of 2: 1 respectively.
  4. Din opposite directions with speed in the ratio of 1: 2 respectively.

Correct answer

D. in opposite directions with speed in the ratio of 1: 2 respectively.

Step-by-step solution

By conservation of momentum aligned & p _ i = p _ f & O = m ₁ u _ 1+ m ₂ u ₂ & u ₁ u ₂ =- [ 1 2 ] as m ₁ ~m ₂ = 2 1 aligned move in opposite direction with speed ratio 1: 2

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