A 5.0 kg block moving east with speed of 6 kg m/s collides head on with another 8.0 kg block moving west with speed of 4 m/s. After the collision the 5.0 kg block was moving west with speed of 5 m/ s while the 8.0 kg block was moving east.
a) What is the speed of the 8.0 kg block after the collision?
b) Determine whether the collision was elastic or inelastic?