Truck 1 has a mass of 10kg and is staionary while Truck 2 has a mass of 15kg and a velocity of 3m/s. Truck 2 collides with Truck 1 and they move off together. What will the velocity of the coupled trucks be. (Assuming a perfect elastic collision with no energy loss).- 1.8m/s
- 2.4m/s
- 0.56m/s
- 3m/s

- Truck 1 has a mass of 30kg and is stationary. Truck 2 is moving at a velocity of 5m/s and has a mass of 30kg. What is the velocity of the coupled up trucks?
- 0.4m/s
- 2.5m/s
- 90m/s
- 9m/s

- Truck 1 has a mass of 50kg and a velocity of 4m/s. Truck 2 has a velocity of 5m/s and a mass of 30kg. What is the velocity after the two trucks have coupled?
- 0.23m/s
- 6m/s
- 4.375m/s
- 5m/s