"The Science of Leverage" Tools and Machinery PPT courseware download

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"The Science of Leverage" Tools and Machinery PPT courseware download

Part 1: Importing new lessons

Is there a "strong man" in our class? Who can help me lift the podium? One of my pens fell under the table. The podium is too heavy to move. Can we use tools to help us do this?

The Science of Leverage PPT, Part 2: New Lesson Learning

Definition of leverage:

Place a support 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.

Three important positions of leverage:

Fulcrum: A position that supports a lever and allows it to rotate around

Force point: the position on the lever where the force is exerted

Resistance Point: The point where the lever overcomes resistance

Why can leverage save effort?

What factors are related to the effort-saving leverage?

Below we use a lever ruler to study the secret of lever effort saving.

The Science of Leverage PPT, Part 3: Summary of Conclusions

Simple machines such as levers can be divided into three categories according to their labor saving: labor-saving, labor-saving, and neither labor-saving nor labor-saving. Whether a lever is effortless or weak is related to the distance between its three points.

The Science of Leverage PPT, Part 4: Classroom Exercises

1. Fill in the blanks

(1) A simple machine that can pry up an object around a fixed fulcrum is called ( ).

(2) Each lever has three points: the point on the lever that exerts force is called the ( ) point; the point that bears the heavy object is called the ( ) point; and the point that plays a supporting role is called the ( ) point.

(3) A simple machine like a crowbar is called ( ).

2. Why are some lever tools designed to require effort?

Extend arms for easy access.

The Science of Leverage PPT, Part 5: Homework Arrangements

1. Why do hair scissors need to be made with labor-intensive levers, while tin shears need to be made with labor-saving levers? Is it okay to use a labor-saving lever to make hair clippers?

2. What benefits does effortful leverage bring us?

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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: 2024-09-09

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

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