A moving particle of mass .m. makes head on elastic collision with another particle of mass 3m. The least Fraction of the initial kinetic energy lost by the first particle (mass m) is

A moving particle of mass .m. makes head on elastic collision with ano

1.	A moving particle of mass .m. makes head on elastic collision with another particle of mass 3m. The least Fraction of the initial kinetic energy lost by the first particle (mass m) is
Answer» `2//3` `5//3` `3//4` `1//3` ANSWER :C