Question

Two particles moving in same direction with velocities 4m/s and 2m/s collide elastically. after collision , the velocity of first particles becomes 3m/s in same dircetion. the velocities of second particle is

Answer 1

formula=u(1)+v(1)=u(2)+v(2)
=4+3=2+v(2)
=v(2)=5
therefore the velocity of second particle is5m/s