A moving particle of mass 'm' makes head-on elastic collision with a particle of mass '2m' which is initially at rest. The fraction of K.E. lost by colliding particle is

A moving particle of mass 'm' makes head-on elastic collision with a p

1.	A moving particle of mass 'm' makes head-on elastic collision with a particle of mass '2m' which is initially at rest. The fraction of K.E. lost by colliding particle is
Answer» `1"/"3` `1"/"9` `8"/"9` `2"/"3` Answer :C