"Can a small man lift a big man?" PPT courseware

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Fourth-grade science volume 2 of the E-education edition	pptx	6 MB

"Can a small man lift a big man?" PPT courseware

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Upload Time: 2024-11-02

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"Can a small man lift a big man?" PPT courseware

Suppose there is a big rock blocking the way. We can't move it with our hands. We only have a wooden stick at hand. Is there any way you can move it away?

1. Definition: A hard rod that can rotate around a fixed point under the action of force

2. Composition:

Fulcrum: A fixed point around which a lever rotates

Force point: the force that causes the lever to rotate

Resistance point: the force that prevents the lever from turning

The distance from the force point to the fulcrum

The distance from the resistance point to the fulcrum

Apply learned knowledge to explain

1. In the previous story, what is the secret of Archimedes defeating the Roman army?

2. The picture is a scientific cartoon. Can you explain it to two children?

Conclusion:

Today we know about levers. We know that there are three points and two distances on a lever. Students already know that levers have a wide range of uses. Some can save effort, and some are very convenient to use. In real life, levers should be selected according to the actual situation. To better serve mankind

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For more information about the PPT courseware "Can a Small Man Lift a Big Man?", please click on the "Can a Small Man Lift a Big Man" ppt tag.

"Can a small man lift a big man?" PPT courseware 3:

"Can a small man lift a big man?" PPT courseware 3 Group discussion: Why can people with very different statures play the seesaw together? Balance of the Seesaw Question: How to balance both sides of the seesaw? Method 1: Move the distance between the people on both sides and the fulcrum Method..

"Can a small man lift a big man?" PPT courseware 2:

"Can a small man lift a big man?" PPT courseware 2 The seesaw is a simple lever 1. What is a lever 2. Five elements of a lever: Fulcrum Power Power arm Resistance Resistance arm Balance of the seesaw Question: How to balance both sides of the seesaw? Method 1: Move...

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Update Time: 2024-11-02

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Can a small man lift a big man ppt

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"Can a small man lift a big man?" PPT courseware