"Simple Machinery on Bicycles" Tools and Machinery PPT Courseware 3

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"Simple Machinery on Bicycles" Tools and Machinery PPT Courseware 3

Bicycles are a simple, convenient and environmentally friendly means of transportation, and many people like to use them.

Write down our findings:

The large gear drives the small gear, and the rotation speed becomes ______.

The small gear drives the large gear, and the rotation speed becomes ______.

simple machine on bicycle

1. When the large gear drives the small gear, the rotation speed becomes ______; when the small gear drives the large gear, the rotation speed becomes ______.

2. Bicycles rely on ____________________ and human power to move forward.

3. If the large gear is 32 and the pinion chamber is 16, then the large gear rotates once and the small gear rotates ______ times

judge

1. The bicycle only uses a simple machine ( )

2. There is no principle of roller skating in bicycles ( )

3. Just use the axle to save effort ( )

4. The closer the support point of the lever is to the object, the farther it is from the point of force, the less effort will be required ( )

5. The force point and resistance point can only act on both sides of the lever fulcrum respectively ( )

6. The slope has the function of victory. The greater the slope, the less effort you have ( )

7. When the bicycle moves forward, the gear on the pedal must rotate faster than the gear on the rear wheel ( )

8. The pattern on bicycle wheels is to increase friction with the ground ( )

choose

1. "As long as you give me a fulcrum in the universe, I can use a long stick to pry up the earth." This is what ( ) said.

A. Newton B. Archimedes C. Aristotle

2. Which of the following statements about pointing locations is correct ( )

A. The fulcrum must be between the force point and the key point. B. The fulcrum must be at a section of the lever.

C. The fulcrum can be between the force point and the key point or between the action points of two forces.

3. ( ) is a machine that combines levers, pulleys, and axles.

A. Fishing rod with fishing reel B. Hand hammer C. Eye nail

4. The rotation of the large sprocket on the central axis of the bicycle transmits power to the small sprocket on the rear axle through ( ).

A. Belt B. Lever C. Chain

5. When using a screwdriver to tighten the screws, the working principle of ( ) is applied; when using a screwdriver to pry the lid of the paint bucket, the working principle of ( ) is applied.

A. Axle B. Lever C. Pulley

6. The force point is close to the fulcrum, and the resistance point is away from the power lever ( ).

A. Effortless lever B. Effortless lever C. Neither effort-saving nor effortful

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

A. Claw hammer B. Door lock handle C. Screwdriver

8. The pulley that can change the direction of force and save effort is ( ).

A. Fixed pulley B. Pulley block C Moving pulley

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For more information about the PPT courseware "Tools and Machines on the Simple Machines on the Bicycle", please click on the Tools and Machines PPT on the Simple Machines on the Bicycle PPT tag.

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Update Time: 2024-11-19

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

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