A particle P moving with speed v undergoes a head - on elastic collision with another particle Q of identical mass but at rest. After the collision

A particle P moving with speed v undergoes a head - on elastic collisi

1.	A particle P moving with speed v undergoes a head - on elastic collision with another particle Q of identical mass but at rest. After the collision
Answer» <P>Both `P`and `Q` move forward with SPEED `(v)/(2)` Both `P` and `Q` move forward with speed `(v)/(sqrt(2))` `P` comes to rest and `Q` moves forward with speed `v` `P` and `Q` move in opposite DIRECTIONS with speed `(v)/(sqrt(2))` Answer :C