"Pulley Block" Tools and Machinery PPT Teaching Courseware

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"Pulley Block" Tools and Machinery PPT Teaching Courseware

Part 1: Importing new lessons

Whether in cities or rural areas, there are many construction sites. What do you find when you visit these busy construction sites? Do you know how cranes send heavy objects to high altitudes?

Pulley set PPT, part 2: new lesson learning

On construction sites, tall cranes are always indispensable.

What do we discover by observing the crane at work?

The movable pulley and the fixed pulley are combined together to form a pulley block.

What function will the pulley block have?

Use this pulley block to lift different weights. Observe the direction of the force and measure the magnitude of the force.

Compared with the direction and magnitude of the force used to directly lift an object, what did we find?

Think about it: Are more pulleys in a pulley block better?

Because the more sets of pulleys there are, the more labor-saving they are.

Use our findings to explain why tower cranes are able to lift such heavy objects.

Because the more sets of pulleys there are, the less effort is required, so tower cranes can lift very heavy objects.

Pulley block PPT, part three: conclusion summary

The fixed pulley does not save effort but can change the direction of the force; the movable pulley cannot change the direction of the force but can save effort (saving half the effort); the combination of the two pulleys saves effort but can change the direction of the force.

Pulley set PPT, Part 4: Classroom exercises

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

1. The more sets of pulleys, the more effort-saving they are. ( )

2. The pulley block cannot change the direction of force. ( )

3. A movable pulley can connect two fixed pulleys. ( )

4． How much effort can be saved by using a pulley block has nothing to do with the number of moving pulleys. ( )

(2) Multiple choice questions

1. We use a long rope and two smooth wooden sticks to play games to verify some principles. ( )

A. Arch B. Pulley block labor-saving C. Axle

2. In the picture below, the hook code on the side of the question mark will be ( )

A． Move up B, move down C, don’t move

Pulley block PPT, part 5: homework arrangement

Based on the learning in the classroom, assemble some pulley blocks by yourself to further simulate and study the function of the pulley blocks.

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

For more information about the PPT courseware "Tools and Machinery Pulley Block", please click the Tools and Machinery ppt Pulley Block ppt tag.

Five PPT charts of the relationships between pulley block designs:

This is a PPT chart of the relationship between five pulley block designs, in .PPTX format;..

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Update Time: 2024-09-09

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

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