"Research on Leverage Tools" Tools and Machinery PPT

Description

"Research on Leverage Tools" Tools and Machinery PPT

Part One: Introduction to the new lesson

(1) Comparison of leveraged instruments

Iron piece opens paint bucket lid

Clips to hold objects

Bottle opener opens beverage bottles

Find out the three important positions of the three tools respectively

Classification of leverage

Effort-saving lever: The distance from the force point to the fulcrum is greater than the distance from the resistance point to the fulcrum

Effort lever: The distance from the force point to the fulcrum is less than the distance from the resistance point to the fulcrum

Effortless lever: The distance from the force point to the fulcrum is equal to the distance from the resistance point to the fulcrum.

(2) Research on small steelyards

How to use leverage

The steelyard is actually an equal-arm lever. Place the items you want to weigh on a place with hooks, place the scale weight on the scale rod, and then weigh it. The scale on the scale is the weight.

Research PPT on leveraged instruments, part 2: expansion and extension

The steelyard is one of the oldest weighing instruments invented by mankind.

Among the cultural relics unearthed from Chu tombs in the eastern suburbs of Changsha, Hunan, China, before 700 BC, there are various exquisite weights, steelyards, weighing pans, silk threads and ropes to tie the scale pans.

Among the cultural relics unearthed from the tombs of the Han Dynasty in China before 200 BC, there are steelyards of various sizes.

Class summary

Leverage can be divided into labor-saving lever, labor-saving lever, and no-effort-no-effort lever. The steelyard applies the principle of leverage.

Research PPT on leverage tools, part three: classroom exercises

1. Judgment

1. Saving labor is only one function of tools, and tools also bring convenience to people. ( )

2. Fishing rods and human arms are labor-saving levers. ( )

3. From the three important positions of lever tools, we can determine whether the lever is labor-saving. ( )

2. Choice

1.The fulcrum of the steelyard is ( )

A. Lifting rope B. Weighing pan C. Weighing weight

2. The following ( ) are effort levers

A. Fishing rod B. Seesaw C. Cutter

3. The principle of application of "Although a weight is small, it can weigh a thousand catties" is ( )

A.Lever B.Axle C.Mechanical

Research PPT on leverage tools, Part 4: Homework

Perfect your homemade little steelyard.

Keywords: Free download of Chinese PPT courseware for the first volume of the sixth grade of the textbook version, PPT download of the study of lever tools, PPT download of tools and machinery, .PPT format;

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

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Update Time: 2024-10-21

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

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