Two particles which are initially at rest , move towards each other under the action of their internal attraction . If their speeds are v and 2v at any instant , then the speed of centre of mass of the system will be

Two particles which are initially at rest , move towards each other un

1.	Two particles which are initially at rest , move towards each other under the action of their internal attraction . If their speeds are v and 2v at any instant , then the speed of centre of mass of the system will be
Answer» 2 V zero 1.5 v v Solution :As no external force is ACTING on the system , the centre of MASS MUST be at rest i.e, `v_(CM) = 0`