1. Chapter 2 Motion Along a Straight Line 第 2 章 直線運動

2. Chapter 2 Straight Line Motion 2-1 What is Physics? 2-2 Motion 2-3 Position and Displacement 2-4 Average Velocity and Average Speed 2-5 Instantaneous Velocity and Speed 2-6 Acceleration 2-7 Constant Acceleration: A Special Case 2-8 Another Look at Constant Acceleration 2-9 Free-Fall Acceleration 2-10 Graphical Integration in Motion Analysis

3. 術語與專門名詞 kinematics 運動學 mechanics 力學 dynamics 動力學 statics 靜力學

4. 2-1 What is Physics? NASCAR –National Association for Stock Car Auto Racing tectonic plate 地殼板塊 artery 動脈 one-dimensional motion 一維運動

5. 2-2 Motion 運動 kinematics 運動學 particle 質點；粒子 stiff pig stiff 剛性 pig 生鐵、銑鐵 playground slide 遊戲場滑梯 tumbleweed 風滾草

6. 2-3 Position and Displacement reference point 參考點、基準點 origin 原點 (zero point 零點 ) position 位置 displacement 位移  x = x 2  x 1 distance 距離 vector quantity 向量 (vector) –magnitude 量值 (absolute value 絕對值 ) –direction 方向

7. Position

8. 2-4 Average Velocity and Average Speed armadillo 犰狳 average velocity 平均速度 v avg slope 斜率 average speed 平均速率 s avg acceleration 加速度

9. Graph of x(t)

11. Average Velocity

12. Sample Problem

13. 2-5 Instantaneous Velocity and Speed instantaneous velocity 瞬時速度 v velocity 速度 v speed 速率 –Speed is the magnitude of velocity speedometer 速率計

14. Sample Problem

15. 2-6 acceleration 加速度 average acceleration 平均加速度 a avg instantaneous acceleration 瞬時加速度 a acceleration 加速度 a

17. 2-7 Constant Acceleration: A Special Case

18. Equations for Motion with Constant Acceleration

21. Sample Problem

22. 2-8 Another Look at Constant Acceleration indefinite integral 不定積分 antiderivative 反導函數

23. 2-9 Free-Fall Acceleration freely falling body 自由落體 free-fall 自由下落 free-fall acceleration 自由落體加速度、 自由下落加速度 free space 真空 (vacuum) g = 9.8 m/s 2 a =  g =  9.8 m/s 2

25. Sample Problem

26. 2-10 Graphical Integration in Motion Analysis

27. Sample Problem whiplash 鞭索 whiplash injury rear-end collision 追撞 torso 軀幹

28. Sample Problem