หนังสือออนไลน์ ระดับสูง ฉบับผู้ใหญ่
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Lesson 1 Science วิทยาศาสตร์18 Topics
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Sub topics หัวข้อย่อย
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New Vocabulary Part 1
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New Vocabulary Part 2
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New Vocabulary Part 3
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Food chemistry
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Environmental chemistry
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Agricultural chemistry
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Thermal expansion and contraction
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Friction
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Types of rocks
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Volcanoes
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Our Solar System
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Body systems part 1
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Body systems part 2
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Science – Audio Clip
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Science - Free Speaking Activity
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Questioning & Answering
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Vocabulary - Unit 1
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Sub topics หัวข้อย่อย
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Lesson 2 Geography ภูมิศาสตร์11 Topics
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Lesson 3 History ประวัติศาสตร์10 Topics
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Lesson 4 Engineering วิศวกรรม11 Topics
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Lesson 5 Business ธุรกิจศึกษา10 Topics
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Lesson 6 Law กฎหมาย12 Topics
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Lesson 7 Politics การเมือง12 Topics
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Sub topics หัวข้อย่อย
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New vocabulary part 1
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New vocabulary part 2
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New vocabulary part 3
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The advantages and disadvantages of an authoritarianism form of government
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Hereditary ruler
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Elections
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Social media
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Politics - Audio clip
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Politics - Free Speaking Activity
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Questioning n Answering
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Vocabulary - Unit 7
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Sub topics หัวข้อย่อย
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Lesson 8 Psychology จิตวิทยา12 Topics
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Lesson 9 Literature วรรณกรรม11 Topics
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Lesson 10 Art ศิลปะ12 Topics
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Lesson 11 Music ศึกษาดนตรี12 Topics
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Lesson 12 Religion ศาสนา12 Topics
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Lesson 13 Language ภาษา10 Topics
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Lesson 14 Physical education พลศึกษา12 Topics
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Lesson 15 Cooking การทำอาหาร12 Topics
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Book 3 Final Test7 Topics
Physics ฟิสิกส์
Friction
Friction
Friction is simply a force that slows down the movement of a moving object. You will find friction everywhere that objects come into contact with one another. The force acts in the opposite direction to the way an object wants to slide. If a car needs to stop at a stop sign, it slows because of the friction between the brakes and the wheels. If you run down the road and stop quickly, you can stop because of the friction between your shoes and the surface of the road. What happens if you run down the sidewalk and you try to stop on a puddle? Friction is still there, but the liquid makes the surfaces smoother and the friction a lot less. Less friction means it is harder to stop which is why so many car accidents happen during heavy rainfall or storms. Even though the friction of the brakes is still there, the brakes may be wet, and the wheels are not in as much contact with the ground. Cars hydroplane when they go too fast on puddles of water.
Question:
หนังสือออนไลน์ ระดับสูง ฉบับผู้ใหญ่
-
Lesson 1 Science วิทยาศาสตร์18 Topics
-
Sub topics หัวข้อย่อย
-
New Vocabulary Part 1
-
New Vocabulary Part 2
-
New Vocabulary Part 3
-
Food chemistry
-
Environmental chemistry
-
Agricultural chemistry
-
Thermal expansion and contraction
-
Friction
-
Types of rocks
-
Volcanoes
-
Our Solar System
-
Body systems part 1
-
Body systems part 2
-
Science – Audio Clip
-
Science - Free Speaking Activity
-
Questioning & Answering
-
Vocabulary - Unit 1
-
Sub topics หัวข้อย่อย
-
Lesson 2 Geography ภูมิศาสตร์11 Topics
-
Lesson 3 History ประวัติศาสตร์10 Topics
-
Lesson 4 Engineering วิศวกรรม11 Topics
-
Lesson 5 Business ธุรกิจศึกษา10 Topics
-
Lesson 6 Law กฎหมาย12 Topics
-
Lesson 7 Politics การเมือง12 Topics
-
Sub topics หัวข้อย่อย
-
New vocabulary part 1
-
New vocabulary part 2
-
New vocabulary part 3
-
The advantages and disadvantages of an authoritarianism form of government
-
Hereditary ruler
-
Elections
-
Social media
-
Politics - Audio clip
-
Politics - Free Speaking Activity
-
Questioning n Answering
-
Vocabulary - Unit 7
-
Sub topics หัวข้อย่อย
-
Lesson 8 Psychology จิตวิทยา12 Topics
-
Lesson 9 Literature วรรณกรรม11 Topics
-
Lesson 10 Art ศิลปะ12 Topics
-
Lesson 11 Music ศึกษาดนตรี12 Topics
-
Lesson 12 Religion ศาสนา12 Topics
-
Lesson 13 Language ภาษา10 Topics
-
Lesson 14 Physical education พลศึกษา12 Topics
-
Lesson 15 Cooking การทำอาหาร12 Topics
-
Book 3 Final Test7 Topics
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Lesson 1 : Friction
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Question 1 of 3
1. Question
1. Where does friction happen?
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Question 2 of 3
2. Question
2. How does a puddle of water make less friction?
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Question 3 of 3
3. Question
3. What happens when cars go too fast on water?