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講者: 許永昌 老師 1. Contents Example: rocket Review of Circular Kinematics Action: the cause of the centripetal acceleration Circular orbits vs. Weightlessness.

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Presentation on theme: "講者: 許永昌 老師 1. Contents Example: rocket Review of Circular Kinematics Action: the cause of the centripetal acceleration Circular orbits vs. Weightlessness."— Presentation transcript:

1 講者: 許永昌 老師 1

2 Contents Example: rocket Review of Circular Kinematics Action: the cause of the centripetal acceleration Circular orbits vs. Weightlessness Fictitious Forces Action: Why does the Water Stay in the Bucket? 2

3 Example: Rocket ( 請預讀 P210~P212) A rocket of mass m is launched at a 45 o angle and then maintains the body of the rocket at The thrust force is F thrust, and it is assumed that the mass and thrust remain unchanged. Find the motion of the rocket (1) in the absence of gravity. (2) with gravity. 3

4 Review of Circular Kinematics ( 請 預讀 P213~P214) 4 這一頁寫的是最一般的形式。

5 Review of Circular Kinematics ( 請 預讀 P226~P228) 5

6 Action: the cause of the centripetal acceleration ( 請預讀 P214~P218) 6

7 Circular orbits vs. Weightlessness ( 請 預讀 P219~P221) 7

8 Homework Student Workbook:

9 Fictitious Forces ( 請預讀 P222~P223) 9

10 Action: Why does the Water Stay in the Bucket? ( 請預讀 P223~P225) Purpose: To understand the reason. Objects: A Marble with a string. A bucket with soft foam blocks. Actions: Swing the string over the head. Fast  slow. Swing the bucket over the head. Fast  slow. Hint: 10

11 Summary of Part I ( 請預讀 P236) 11

12 Homework Student Workbook: P8-5~P8-6. Textbook: Terms and Notation ( 只有兩個單字 ) 12


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