# Homework_3 - Homework 3 Chapter 3 Review Questions 5 6 7 8...

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Homework 3 Chapter 3 Review Questions 5, 6, 7, 8, 9 (also, is it accelerating?), 11, 12, 13, 14, 15, 16, 17, 19, 20, 22, 24 Plug and Chug 2, 4, 9, 12, 14, 15, 17, 19, 20, 22 Ranking 4 Exercises 20, 28, 32, 34, 44 Problems 2, 4, 6 Slide 14, with a 150kg crate on a 60 o incline. Slide 31, with the book thrown at 15.0 m/s at an angle of 60 o . Slide 32, questions.

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17. What relationship did Galileo discover about a ball's acceleration and the steepness of an incline? What acceler- ation occurs when the plane is vertical? Free Fall-How Fast lB. What exacrly is meant by a "freely falling" object? 19. What is the gain in speed per second for a freely falling object? 20. What is the velocity acquired by a freely falling object 5 s after being dropped from a rest position? What is the veloci ty 6 s after? 21. The acceleration of free fall is about 10 m/s 2 . Why does the seconds unit appear twice? 22. When an object is thrown upward, how much speed does it lose each second? CHAPTER 3 LINEAR MOTION 47 How FaT 23. What relationship between distance traveled and time did Galileo discover for accelerating objects? 24. What is the distance fallen for a freely falling object 1 s after being dropped from a rest position? What is it 4 s after? 25. What is the effect of air resistance on the acceleration of falling objects? What is the acceleration with no air resist- ance? How Quickly "How Fast" Changes 26. Consider these measurements: 10 m, 10 mis, and 10 m/s 2 . Which is a measure ofdistance, which of speed, and which of acceleration? PROJECTS 1. Grandma is inrerested in your educational progress. She perhaps has liule science background and may be machematically chal- lenged. Write a letter co Grandma, without using equations, and explain co her the difference between velociry and acceleration. Tell her why some of your classmates confuse the two, and state s0Ill,.e examples that clear up the confusion. 2. Stand flatfooted next co a wall. Make a mark at the highest point you can reach. Then jump verrically and mark chis highest poinr. The distance between che marks is your venical jumping distance. Use this data to calculate your personal hang time. P L UG AND CHUG These are "pLug-in-the-number" type activities to familiarize you with the equations that Link the concepts ofphysics. They are mainly one-step substitutions and are Less chaLLenging than the ProbLems. distance
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Homework_3 - Homework 3 Chapter 3 Review Questions 5 6 7 8...

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