Question

Two identical balls A and B are moving
towards each other with velocity + 5 m/s and
- 3 m/s, undergoes head on collision. There
velocities after collision will be [BP 2014​

Answer 1

Answer:

as they are identical balls then mass of A and B be m

initial velocity of A ,u=5m/s

and initial velocity of B ,u1=-3m/s

according to the law of conservation of momentum

mu+mu1=mv+ mv

both of them after collision will have same velocity i.e v

m(u+u1)=2mv

u+u1=2v

5-3=2v

2=2v

1=v

the velocity after collision is 1m/s