Question

Two particles of masses $m_1,m_2$ moving with initial velocities $u_{1}and{u}_2$. On collision, one of the particles get excited to higher level, after absorbing energy ε . If final velocities of particles be $v_{1}and{v}_2$ then we must have :

• A. 1/2 m²₁u²₁+1/2m²₂u²₂+ε =1/2 m²₁v²₁+1/2m²₂v²₂
• B. m²₁u₁+m²₂u₂ – ε = 1/2 m²₁v₁+m²₂v₂
• C. 1/2 m₁u²₁ + 1/2 m2u²₂ =1/2 m₁v²₁ + 1/2 m₂v²₂ – ε
• D. 1/2 m₁u²₁ + 1/2 m₂u²₂ – ε = 1/2 m₁v²₁ + 1/2 m₂v²₂

Answer 1

The correct option is D

1/2 m₁u²₁ + 1/2 m₂u²₂ – ε = 1/2 m₁v²₁ + 1/2 m₂v²₂

System's energy will be used for excitation