"Research on Lever Tools" Tools and Machinery PPT Courseware 3

Description

"Research on Lever Tools" Tools and Machinery PPT Courseware 3

Things done well

1. Do experiments carefully.

2. Record carefully.

3. After the experiment is completed, consciously put the experimental equipment back to its original place.

4. Analyze experimental data and draw conclusions.

Areas for improvement

1. Some students have been playing with experimental equipment.

Responsible for cleaning after each experimental class

2. A few students did not participate in the experiment seriously.

These students stayed after class to complete the experiment

3. Some groups did not put the experimental equipment back to its original place.

4. The division of labor in group cooperation during the experiment is unclear.

Four people worked together in each experiment, and their positions were rotated in each experiment.

Our experimental conclusions:

1. Under what circumstances does leverage save effort?

The point of force is far from the fulcrum, and the point of resistance is close to the fulcrum.

2. Under what circumstances is leverage laborious?

The point of effort is closer to the fulcrum, and the point of resistance is farther from the fulcrum.

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

The distance from the force point to the fulcrum is equal to the distance from the resistance point to the fulcrum

Steps to make a small steelyard

Use a small finger-thick bamboo chopstick or straight wooden stick (about 30~50 cm long)

Polish it smooth; size 1 to 10 50-gram hooks, and tie one of them with fishing line to make a weight.

Make a homemade weighing pan, tie three strings of equal length and fix them on the scale beam.

Choose an appropriate position between the scale weight and the scale pan and tie a rope loop to it as the balance point for the first experiment.

Use the method of placing weights one by one to draw 50 grams, 100 grams, 150 grams, 200 grams... on the rod.

scientific concept

Leverage can be divided into effortless lever, effortful lever, and neither effortless nor effortful lever.

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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.

"Research on Leverage Tools" Tools and Machinery PPT download:

"Research on Lever Tools" Tools and Machinery PPT Download Part One: New Lesson Learning Find out the fulcrum, force point and resistance point of the iron piece, bottle opener and clamp respectively. What is the difference between their three o'clock positions? Among these three types of levers, which one is labor-saving and which one is labor-intensive?

"Research on Leverage Tools" Tools and Machinery PPT:

"Research on Lever Tools" Tools and Machinery PPT Part One Content: New Lesson Explanation (1) Comparison of Lever Tools Iron piece to open paint bucket lid Clamp to clamp object Bottle opener to open beverage bottle Find three of the three tools respectively Classification of levers at important positions...

"Research on Lever Tools" Tools and Machinery PPT Courseware 5:

"Research on Lever Tools" Tools and Machinery PPT Courseware 5 The hook code hanging on the left side of the lever ruler is regarded as a heavy object, and the number of grids on the hook code is the key position. The weight of the hook hanging on the right side of the lever ruler is the force used to lift the heavy object. The number of grids hung by the hook code is the strength point.

File Info

Update Time: 2024-11-26

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

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