12 Questions
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?
closest to the load
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?
fulcrum
What is an example of a wheel and axle in everyday life?
roller blades
What is the relationship between the distance the lever moves and the effort required, when using a lever?
as the distance the lever moves is increased, the effort decreases
What is the characteristic of a class 1 lever that allows it to be balanced?
The same amount of weight on both sides.
What is the purpose of a belt system in mechanics?
To transfer motion between wheels or gears.
What is required for the wheels to move in opposite directions in a belt system?
The belt must twist or cross over.
Why do the teeth of gears need to be the same size?
So that they can mesh properly and transfer motion smoothly.
What determines the class of a lever (class 1, 2, or 3)?
The position of the fulcrum, effort, and load.
What is the role of the fulcrum in a lever system?
It is the pivot point around which the lever rotates.
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.
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!
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