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Question

Two particles of masses m1,m2 movie with initial velocities u1 and u2.On collision, one of the particles get excited to higher level, after absorbing energy If final velocities of particles be v1 and v2 then we must have :

A
12m1u21+12m2u22=12m1v21+12m2v22ε
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B
12m1u21+12m2u22+ε=12m1v21+12m2v22
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C
12m21u21+12m22u22ε=12m21v21+12m22v22
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D
m21u1+m22u2ε=m21v1+m22v2
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Solution

The correct option is C 12m21u21+12m22u22ε=12m21v21+12m22v22
Totalinitialenergyoftwoparticles=12m1u12+12m2u22Totalfinalenergyoftwoparticles=12m1v12+12m2v22+Usingenergyconservationprinciple,12m1u12+12m2u22=12m1v12+12m2v22+12m1u12+12m2u22=12m1v12+12m2v22
Hence,
option (C) is correct answer.

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