1. 41 point total

2. Problem #1- 2 points
A moving car has momentum. If it moves twice as fast, its momentum is twice as much.

3. Problem #1- 2 points
A moving car has momentum. If it moves twice as fast, its momentum is twice as much.

4. Problem #2- 2 points
Two cars, one twice as heavy as the other, move down a hill at the same speed. Compared to the lighter car, the momentum of the heavier car is twice as much.

5. Problem #2- 2 points
Two cars, one twice as heavy as the other, move down a hill at the same speed. Compared to the lighter car, the momentum of the heavier car is twice as much.

6. Problem 3
Each part 3 points each

7. kg
403 kg
10 m/sec
6.9 m/sec

8. 322 kg
483 kg
15 m/sec
10 m/sec

9. 598 kg
44.85 kg
2.7 m/sec
36 m/sec

10. 162 kg
486 kg
10.5 m/sec
3.5 m/sec

11. Problem 4
5 points

12. Let X = momentum
X = mv
X = 2 kg X 2.8 m/sec
X = 5.6 kg · m/sec

13. Problem 5
10 points

14. Let X = momentum
X = mv
X = 1000 kg X 1 m/sec
X = 1000 kg · m/sec

15. Let X = momentum
X = mv
X = 70 kg X 8 m/sec
X = 560 kg · m/sec

16. Problem 6
5 points

17. Let X = momentum
X = mv
X = 3500 kg X 2.36 m/sec
X = 8260 kg · m/sec

18. Problem 7
5 points

19. Let X = momentum
X = mv
X = 66.8 kg X 23.5 m/sec
X = kg · m/sec