Two balls A and B, with equal mass m, approach the origin from the negative X axis and negative Y axis respectively, each with speed v, and collide at the origin. After collision, particle A breaks into two equal parts, A1 and A2. A1 moves along X-axis and A2 moves along Y-axis , each with speed v. The speed of Particle B after collision is:
1
\({v \over \sqrt{2}}\)
2
\({\sqrt{2} v}\)
3
v
4
2v