"The Secret of Wheels and Axles" Tools and Machinery PPT Courseware 4

Description

"The Secret of Wheels and Axles" Tools and Machinery PPT Courseware 4

When we twist the wheel on the faucet, the shaft will rotate together to open the faucet.

A machine like a faucet where the wheel and axle are fixed together and can rotate is called an axle.

If you take off the wheel on the faucet and twist the shaft directly, will it still be easy to unscrew the faucet?

What is the function of the axle?

Use the wheel and axle experimental device to study the role of the wheel and axle

Hanging a certain number of hook codes on the shaft is regarded as the resistance to be overcome, and the hook codes on the wheel are regarded as the amount of force we exert.

Give it a try. Hanging a few hooks on the wheel can lift the hooks on the shaft.

Experiment a few more times by changing the number of hooks on the shaft.

Summarize

1. The axle is a deformation lever, which also has three points.

2. When the axle axis of the wheel is fixed, the larger the wheel, the more labor-saving it will be.

3. It takes more effort to use force on the axle, but less effort when using force on the wheel.

Test questions in class

1. True or False Questions (mark √ if correct, × if incorrect)

1. The axle is not a lever. ( )

2. The tap uses an axle. ( )

3. The handlebar of a bicycle is not a wheel-axle principle. ( )

4. The steering wheel of the car uses the wheel-axle principle. ( )

5. A screwdriver is not an axle. ( )

6. The larger the wheel of the axle, the easier it is to work. ( )

2. Multiple choice questions

1. Which of the following machines belongs to the wheel and axle ( ).

A. Balance B. Scissors C. Wrench

2. To tighten the screw caps on the bicycle, choose which tool takes the least effort. ( )

A Pliers B Screwdriver C Nail hammer D. Wrench

3. The bottom part is not the axle. ( )

A car steering wheel B scissors C screwdriver

4. We once used a big screwdriver as a tool to play a game of "the little man beats the strong man", and the screwdriver at this time became ( )

A. Axle B. Lever C. Pulley

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For more information about the PPT courseware "The Secret of Tools and Mechanical Wheels and Axles", please click the "Secrets of Tools and Mechanical Wheels and Axles" ppt tag.

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Update Time: 2024-11-21

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

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