"Exploring - Does Using Machinery Save Work?" Machinery and Work PPT Courseware 4

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"Exploring - Does Using Machinery Save Work?" Machinery and Work PPT Courseware 4

What are the two necessary factors for doing work?

The force acting on an object, the distance the object travels in the direction of the force

What is the function of simple machines?

Can using simple machines save labor or distance, or work?

What are the ways to transport this object to a high place?

Lift the object directly up with your hands.

Use a lever to lift the object.

Use pulley or pulley block

Hands-on experiments:

Use a moving pulley or pulley block to lift an object weighing 2N by 0.2m at a constant speed.

1. Can labor-saving machines or labor-intensive machines save work?

2. Can a machine with large self-weight and friction or a machine with negligible self-weight and friction save power?

The principle of work--You cannot save work by using any machinery.

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For more information about the PPT courseware "Machines and Power to Explore whether Using Machinery Saves Work", please click on the "Machine and Power ppt to Explore whether Using Machinery Saves Work" ppt tag.

"Exploring - Whether Using Machinery Saves Work" Machinery and Work PPT Courseware 3:

"Exploring whether using machinery saves work" Machinery and Work PPT Courseware 3 Teaching objectives: (1) Knowledge objectives 1. Know that using machinery does not save work. 2. Understand useful work and total work. 3 Understand mechanical efficiency. (2) Ability goal 1. Learn to attribute from physical phenomena and experiments..

"Exploring - Whether Using Machinery Saves Work" Machinery and Work PPT Courseware 2:

"Exploring whether using machinery saves work" Machinery and Work PPT Courseware 2 Preview Tips 1. What are the two necessary factors for doing work? for example. What are the formulas and units for calculating work? 2. What are useful work, total work and extra work? 3. What is mechanical efficiency? count..

"Exploring - Whether Using Machinery Saves Work" Machinery and Work PPT Courseware:

"Exploring whether using machinery saves work" Machinery and Work PPT Courseware Knowledge Review 1. Can labor-saving machines or labor-saving machines save work? 2. Can a machine with large self-weight and friction or a machine with negligibly small self-weight and friction save power? Mechanical efficiency 1. Useful work..

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Update Time: 2024-09-16

This template belongs to Physics courseware Beijing Normal University eighth grade physics volume 2 industry PPT template

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