Name: __________________________________________ Period: ___ Date: _________

1. How do we know when an object is moving?
2. What is a reference frame?
3. What do speed measurements involve?
4. What is the SI unit for speed?
5. Define constant speed.
6. What does it mean if a racer car has a constant speed of 96 m/s?
7. What kind of graph determines speed?
8. Look at figure 8-2.On what axis distance is plotted?
9. On what axis time is plotted?
10. How can you find the speed of the racer car?
11. How can you find the speed of the racer car?
12. How does the distance-time graph of a fast moving object look like?
13. What is the speed of a parked car?
14. What does the distance – time graph of a resting object look like?
15. Look at the graph in figure 8-2. The line representing which object is steepest? What does it mean?
16. How will you calculate speed?
17. Write down the speed equation.
18. Define velocity.
19. When do you consider velocity to be positive or negative?
20. "Even when a car has constant speed its velocity can be changed." How?
21. Moving objects have ____________________________.
22. Define momentum.
23. What is the SI unit for momentum?
24. Write down the momentum equation for straight-line motion.
25. Write down the law of conservation of momentum.