"How Lever Works" Construction and Simple Machinery PPT Courseware

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"How Lever Works" Construction and Simple Machinery PPT Courseware

A simple machine like a crowbar is called a lever

Activity 1: Get to know the arch pole

1. What are the three important positions on the lever?

2. What is the function of each location point?

There are three important positions on the lever: fulcrum, force point, and resistance point

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

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

Resistance Point: The point where the lever overcomes resistance

Activity 2: Are the following tools leverage? Discuss the reasons in the group.

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.

Our experimental conclusions:

1. Under what circumstances does leverage save effort?

When the distance from the force point to the fulcrum is greater than the distance from the resistance point to the fulcrum, the lever is effortless.

2. Under what circumstances does leverage become laborious?

When the distance from the force point to the fulcrum is less than the distance from the resistance point to the fulcrum, the lever is effortful.

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

When the distance from the force point to the fulcrum is equal to the distance from the resistance point to the fulcrum, the lever is effortless and effortless.

discuss:

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 laborious leverage bring to us?

Class evaluation:

After studying this lesson, what scientific knowledge have you mastered? what do you think? Can it be applied to real life?

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"How Lever Works" Construction and Simple Machinery PPT Courseware 2:

"How Lever Works" Architecture and Simple Machinery PPT Courseware 2 Archimedes Archimedes (287 BC 212 BC), a famous ancient Greek philosopher, mathematician, physicist, and scientist. Experience the role of a good helper. Give me a fulcrum and I can lift the whole...

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Update Time: 2024-11-17

This template belongs to science courseware People's Education Press Fifth Grade Science Volume 1 industry PPT template

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