A particle of mass m1 moves with velocity v1 and collides with another particle at rest of equal mass. The velocity of the second particle after the elastic collision is

Given, mass, m1 = m2Velocity, u1 = v1 and u2 = 0Foe elastic collision, v2=m2 - m1m1 + m2 u2 + 2m1u1m1 + m2After putting the given values, we get                          v2=2m1v12m1⇒v2=v1