Which statement about a perfectly elastic collision between two objects is correct?
Total kinetic energy is conserved and the relative speed of approach equals the relative speed of separation.
2 )
Total kinetic energy is conserved but the relative speed of approach does not equal the relative speed of separation.
3 )
Total kinetic energy is not conserved and the relative speed of approach does not equal the relative speed of separation.
4 )
Total kinetic energy is not conserved but the relative speed of approach does equal the relative speed of separation.
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