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A billiards ball strikes elastically an another identical ball, then the following is conserved (i) Momentum of each ball (ii) Kinetic energy of each ball (iii) Total kinetic energy of system

A billiards ball strikes elastically an another identical ball, then the following is conserved (i) Momentum of each ball (ii) Kinetic energy of each ball (iii) Total kinetic energy of system Correct Answer (iii) only

In an elastic collision, momentum and kinetic energy of whole system is conserved.

It is not necessary to be true for individual bodies.

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