Question

1. a 2000 kg SUV is moving at 25 m/s. What force is needed to bring it to a stop in 8 seconds?

2. A 20 kg child is sitting in a 15 kg wagon that is moving at 3 m/s. what is the total momentum in the system?

3. A 75 kg train car moving at 2.4 m/s collides with a second identical train car at rest. if they hook together when the collide, what is the final speed of the two?

4. a 4000 kg train car moving at 2.4 m/s. same question as 3.

5. a 6 kg bowling ball and a 4 kg bowling ball are rolled toward each other. the 6 kg ball is initially moving at 5.1 m/s and the 4 kg ball is moving in the opposite direction at 1.3 m/s. if the 6 kg ball slows to 1.5 m/s, what is the final speed of the 4 kg ball?

Answer 1

Answer:

1) - 6250 N

2) p= 105 kgm/s

3) 1.2m/s

4)1.2m/s