Question

Four particles A,B,C,D of equal mass are placed at four corner of a square.they move with equal uniform speed v towards the intersection of the diagonals. After collision, A comes to rest, B traces its path back with same speed and C and D move with equal speeds. What is the velocity of C after collision-
1-2/3v
2-2v
3-v/2
4-v

Answer 1

2 is the best answer