"The Science of Leverage" Tools and Machinery PPT

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"The Science of Leverage" Tools and Machinery PPT

Part One: Understanding Leverage

Place a supporting object under a stick and use it to lift heavy objects. People call such a stick a crowbar.

A simple machine like a crowbar is called a lever.

There are three important positions on the lever: the position that supports the lever and allows the lever to rotate around is called the fulcrum; the position where force is exerted on the lever is called the force point; and the position where the lever overcomes resistance is called the resistance point.

The Science of Leverage PPT, Part 2: Studying the Secrets of Leverage

Will using a crowbar definitely save effort when lifting heavy objects? What can be done to save effort?

We can use a lever ruler to study this problem. There is a fulcrum on the lever ruler, and there are marks on the left and right sides to the distance from the fulcrum. It is a good tool for us to study the effect of leverage.

We regard the lever ruler as a "crowbar", the hook code hanging on the left side of the lever ruler as the heavy object to be pried up, and the hook code hanging on the right side of the lever ruler as the force we use.

Statistics record the data in the table.

There are _____ situations that save effort; there are _____ situations that require effort; there are _____ situations that don’t save effort or require effort.

Analyzing the data in the experimental record sheet, what patterns did we find?

1. Under what circumstances does leverage save effort?

2. Under what circumstances is leverage laborious?

3. Under what circumstances does leverage require neither effort nor effort?

Rules of the Leverage Ruler

The distance from the force point to the fulcrum = the distance from the resistance point to the fulcrum

The distance from the force point to the fulcrum > the distance from the resistance point to the fulcrum

The distance from the force point to the fulcrum

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For more information about the "Science of Tools and Mechanical Lever" PPT courseware, please click the "Science of Tools and Mechanical Lever ppt" tab.

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Update Time: 2024-10-12

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 1 industry PPT template

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