Chapter 1 Study Guide - kyrene.org

1 physics Chapter 1 Study Guide Name _____ Per. _____ Vocabulary- Be able to define the following terms: 1. position- 2. reference point- 3. motion- 4. speed- 5. velocity- 6. vector- 7. acceleration- Fill in the blank: 8. In order to describe the position of an object you need to use a _____ _____. 9. _____ _____ is the idea that the observation of motion depends on the location of the observer. 10. The formula for speed is _____. 11. The formula for average speed is _____. 12. _____ is speed and direction. 13. _____ are represented with an arrow.

2 14. _____ and _____ are both vector quantities because they both have size and direction. 15. A change in velocity is called _____. 16. The formula for acceleration is _____. 17. Acceleration is _____ if an object is speeding up, and _____ if the object is slowing down. Solve the following problems and include the appropriate units in your answer: 18. S=300m/15s Answer _____ 19. S= (35m-20m)/(10s-5s) Answer _____ 20. A car travels 50 miles in the first hour and 60 miles in the second hour. What is the car s average speed over the entire trip?

3 Answer _____ 21. a= 15m/s-10m/s 5s Answer _____ 22. A skater initially at rest increases his speed to 8m/s in 20 seconds. What is his acceleration? Answer _____ 23. A lion running at 24 m/s slows and comes to a stop in 5 seconds. What is the lion s acceleration? Answer _____ Using the Distance-Time Graph answer questions # 23-26: 24. During which interval did the zebra s have an average speed of 12m/s? Answer _____ 25. Calculate the average speed of the zebra over the 60 seconds shown on the graph. Answer _____ 26.

4 The zebra was stopped during which time interval? Answer _____ 27. If the zebra experiences negative acceleration between t=60s and t=70s, what would you expect to happen to the slope of the line? Answer _____ 28. Suppose you are in a car and see another car that appears to you to be moving forward. If the other car is not actually moving forward, what might be happening? Explain why the motions would look the same using the terms relative motion and frame of reference in your answer. 29. If a person is riding a bike on a circular track at a steady rate, what kind of acceleration is occurring?

5 30. If a person is riding a bike on a straight track at a changing rate of speed, what kind of acceleration is occurring?