1. Chapter 1 The Study of Motion

13. Metric prefixes , cont’d Power of 10 Prefix Symbol 10 15 peta P 10 12 tera T 10 9 giga G 10 6 mega M 10 3 kilo k 10 -2 centi c 10 -3 milli m 10 -6 micro  10 -9 nano n 10 -12 pico p 10 -15 femto f

29. Example ANSWER: For the thunder: For the flash:

48. Example Example 1.3 ANSWER: The problem gives us The acceleration is:

49. Example Example 1.3 CHECK: Does this make sense? The car needs to increase its speed 5 m/s in 4 seconds. If it increased 1 m/s every second, it would only reach 24 m/s. So we should expect an answer slightly more than 1 m/s every second.

51. Example Example 1.3 ANSWER: The problem gives us The acceleration is:

52. Example Example 1.3 CHECK: Does this make sense? If she was traveling at 10 m/s, reducing her speed 2 m/s every second would stop her in 5 seconds. What’s up with the minus sign?

59. Example Example 1.5 ANSWER: The problem gives us The acceleration is:

61. Example Problem 1.18 ANSWER: The problem gives us The acceleration is: