A ball collides elastically with another ball of same mass. The collision is oblique and initially one of the ball was at rest. After the collision, the two balls move with same speeds. What will be the angle between the velocity of balls after collision

Q: A ball collides elastically with another ball of same mass. The collision is oblique and initially one of the ball was at rest. After the collision, the two balls move with same speeds. What will be the angle between the velocity of balls after collision

(a) 30°

(b) 45°

(c) 60°

(d) 90°

Ans: (b)