Question

Two identical balls A and B having velocities of 0.5 m s^-1 and -0.3 m s^-1 respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be

(a) -0.5 ms^-1 and 0.3 ms^-1

(b)  0.5 ms^-1 and -0.3 ms^-1

(c)  -0.3 ms^-1 and 0.5 ms^-1

(d) 0.3 ms^-1  and 0.5 ms^-1

Answer 1

Correct option (b)  0.5 ms^-1 and -0.3 ms^-1

Explanation:

Masses of the balls are same and collision is elastic, so their velocity will be interchanged after collision.