Podcast
Questions and Answers
What is the main function of a fixed pulley?
What is the main function of a fixed pulley?
changing the direction of the force
Where should the fulcrum be positioned when using a class 1 lever to lift a load?
Where should the fulcrum be positioned when using a class 1 lever to lift a load?
closest to the load
What is the key characteristic of a second class lever?
What is the key characteristic of a second class lever?
the load is in the middle
What is the term for the point where a lever pivots?
What is the term for the point where a lever pivots?
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What is an example of a wheel and axle in everyday life?
What is an example of a wheel and axle in everyday life?
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What is the relationship between the distance the lever moves and the effort required, when using a lever?
What is the relationship between the distance the lever moves and the effort required, when using a lever?
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What is the characteristic of a class 1 lever that allows it to be balanced?
What is the characteristic of a class 1 lever that allows it to be balanced?
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What is the purpose of a belt system in mechanics?
What is the purpose of a belt system in mechanics?
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What is required for the wheels to move in opposite directions in a belt system?
What is required for the wheels to move in opposite directions in a belt system?
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Why do the teeth of gears need to be the same size?
Why do the teeth of gears need to be the same size?
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What determines the class of a lever (class 1, 2, or 3)?
What determines the class of a lever (class 1, 2, or 3)?
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What is the role of the fulcrum in a lever system?
What is the role of the fulcrum in a lever system?
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Study Notes
Types of Levers
- A Class 1 lever has the same amount of weight on both sides to be balanced.
- A Class 2 lever has the load in the middle.
Pulleys
- A fixed pulley makes work easier by changing the direction of the force.
- A moveable pulley helps do work by changing the amount of effort needed to lift the force.
Levers in Real World
- Examples of levers in real world include paint roller and roller blades.
Fulcrum, Effort, and Load
- The fulcrum is the point in which a lever pivots.
- To use a Class 1 lever to lift a load, the fulcrum should be closest to the load.
Gears
- The teeth of gears need to be the same size.
- The direction of gear movement can be determined by the direction of rotation of the drive gear.
Belts and Wheels
- A belt system can be designed to show wheels driving in the same direction and speed.
- A belt system can be designed to show wheels driving in different speeds and directions.
- To make wheels move in opposite directions, the belt system needs to be changed.
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Description
Test your understanding of simple machines with this fill-in-the-blank and multiple-choice quiz on wheels and levers, including types of levers and how they work. Score 11 marks by answering questions about loads, fulcrums, and more!
