People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Ninth Grade Physics Complete Book
Shanghai Science Edition Ninth Grade Physics
People's Education Edition Physics for Grade 8, Volume 1
Beijing Normal University eighth grade physics volume one
Shanghai Science Edition 8th Grade Physics
Lu Jiao Edition Ninth Grade Physics Volume 1
Beijing Normal University Ninth Grade Physics Volume 1
Lu Jiao Edition Ninth Grade Physics Volume 2
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
Lu Ke Edition High School Physics Compulsory Course One
People's Education Press High School Physics Compulsory Course II
Beijing Normal University Ninth Grade Physics Volume 2
Lu Jiao Edition Eighth Grade Physics Volume 2
Guangdong and Shanghai version of eighth grade physics volume 2
Lu Jiao edition eighth grade physics volume 1
!["Newton's First Law" Motion and Force PPT Courseware 3](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/c48505bc-dd3b-485f-889a-a146de115893.webp)
Category | Format | Size |
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People's Education Edition Physics for Grade 8, Volume 2 | pptx | 6 MB |
Description
"Newton's First Law" Motion and Force PPT Courseware 3
Want to discuss:
What is the relationship between motion and force?
What should we do to make objects move?
If there is no force on a moving object, how will the object move?
Is force required to maintain movement?
You must have had this life experience: when riding a bicycle on flat ground, even if you don't step on the pedal, the bicycle will move forward for a certain distance, but because you don't use any more force, it will eventually stop. This kind of phenomenon is often encountered in life.
For example: a train with a shut down engine will stop
The free swing will stop
And the ball that is hit will also stop.
Please consider the following questions:
1. Why does the same car have to be released from the same slope and from the same height every time?
2. What factors are related to the distance the car slides on the plane? What does it matter?
3. Why did the car finally stop? (Why did the car stop?)
The reason a moving car slows down and eventually stops is due to frictional resistance.
Is this conclusion confirmed experimentally?
This conclusion is based on reliable facts and obtained through scientific reasoning. It cannot be confirmed through experiments, but its conclusion is consistent with scientific principles.
All objects always maintain a state of uniform linear motion or a state of rest when they are not acted upon by external forces.
1. “Everything” applies to all objects;
2. "No external force is acting on" is the condition for the law to be established, including that the object is indeed not acted upon by external force and the object is acted upon by a balancing force;
3. "Always maintained" means that when an object is not acted upon by an external force, it has only two possibilities: stationary or uniform linear motion.
4. "Or" means that one of the two states must exist, not at the same time.
Newton's first law was not derived directly through experiments, but was summarized by reasoning based on a large number of experiments. It cannot be directly proven by experiments.
Inertia: The property of an object maintaining its original state of rest or uniform linear motion is called inertia.
(1) Inertia is an inherent property of an object.
(2) Mass---is the only measure of inertia.
(3) Inertia phenomenon: Under certain conditions, objects appear due to inertia.
Inertia has nothing to do with external conditions such as the object's state of motion and location.
inertial interpretation method
1. The original state of the object
2. Observe which object (or part of an object) suddenly changes its state of motion after being acted upon by an external force, and indicate the change in state of motion.
3. How does an object maintain its original state of motion due to inertia?
4. Explain the phenomenon given in the question
Explain the following phenomena of inertia:
1. Inertia phenomenon when the car brakes suddenly.
2. Inertia phenomenon when starting the car.
3. Pat clothes to remove dust.
4. Shake your hands hard to get rid of the water on your hands.
5. The worker used a shovel to throw coal into the fire.
6. Hit the hammer handle downwards and the hammer will clamp the wooden handle.
7. After jumping, it will still fall back to its original place and will not be thrown down by the high-speed rotating earth.
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For more information about the "Newton's First Law of Motion and Forces" PPT courseware, please click on the "Newton's First Law of Motion and Forces ppt ppt" tag.
"Newton's First Law" PPT courseware on the relationship between motion and force:
"Newton's First Law" PPT courseware on the relationship between motion and force Part 1: Learning objectives 1. Know Galileo's ideal experiment and its reasoning process, and know that ideal experiment is an important method of scientific research. (Difficulty) 2. Understand the content and significance of Newton's first law..
"Newton's First Law" PPT on the relationship between motion and force:
"Newton's First Law" PPT on the relationship between motion and force Part 1 Content: Course Standard Requirements 1. Know Galileo's ideal experiment and its reasoning process, and know that ideal experiment is an important method of scientific research. 2. Understand the content and significance of Newton's first law. 3. Understand the habit...
"Newton's First Law" PPT download:
"Newton's First Law" PPT download Part 1: The relationship between force and motion Activities: 1. Gently push books, pencil boxes and other objects on the table with your hands to observe the motion of these objects. 2. After the force is removed, what state will these objects be in? Given that..
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Update Time: 2024-08-19
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