question_answer

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                            [Roorkee 2000]

A)             Both P and Q move forward with speed \[\frac{v}{2}\]

B)             Both P and Q move forward with speed \[\frac{v}{\sqrt{2}}\]

C)             P comes to rest and Q moves forward with speed v

D)             P and Q move in opposite directions with speed \[\frac{v}{\sqrt{2}}\]