Two particles of different masses collide head on. Then for the system

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Loss of K.E. is zero, if it were perfect elastic collision.

If it were perfect inelastic collision, the loss of K.E. of the bodies moving in opposite directions is more than that of the bodies
moving in the same direction

loss of momentum of the system is zero for both elastic and inelastic collisions

all the above are true

answer is D.

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Detailed Solution

Loss of kinetic energy in an elastic collision is zero.
Option B is likewise accurate since approaching bodies will move more slowly, which will result in a loss in kinetic energy. will increase.
Due to momentum conservation, there can never be any momentum loss in an isolated system.

Hence the correct answer is all the above are true.

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