Block A has a mass of 3kg and velocity of 13m/s. catching up with a second block B that has a mass of 3kg ans is moving with 5m/s in the same direction. They suffer an elastic collision and block B is now moving with 8m/s. What is the speed of block A after collision?
- 10m/s
- 8m/s
- 5m/s
- 13m/s
- 18m/s