Solve the previous problem , if particles moving in opposite direction.

Explanation

`m xx 10 - 2m xx 5 = mv_(1) + 2mv_(2)` (i)
`v_(1) + u_(1) = v_(2) + u_(2)`
`v_(1) + 10 = v_(2) - 10` (ii)
{ use velocities with sign}
Solving , `v_(1) = -(40)/(3) m//s , v_(2) = (20)/(3) m//s`
Particle of mass `m` move with speed `40//3 m//s` in opposite direction.