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What are the components of a lever system?
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Fulcrum, Load/Resistance, and Effort.
In a lever system, what does the resistance arm represent?
The distance from the fulcrum to the point where the load or resistance is applied.
Why is it important to determine the correct lever class?
Recognizing the lever class aids in understanding its mechanical advantage and the efficiency of force application.
What is a second-class lever and provide an example.
A second-class lever has the load between the fulcrum and the effort. An example is a wheelbarrow.
Why do third-class levers generally have a low mechanical advantage?
Because the effort arm is typically shorter than the resistance arm.
Explain the significance of 'FLE 123' in lever systems.
'FLE 123' is a mnemonic to determine the class of a lever: Fulcrum for first-class, Load for second-class, Effort for third-class.
How can you recognize the class of a lever in a diagram?
By identifying which component (fulcrum, load, or effort) is positioned in the middle.
In lever diagrams, what does the effort arm represent?
The distance from the fulcrum to the point where the effort is applied.
Give an example of a device that uses a second-class lever.
A wheelbarrow is an example of a device that uses a second-class lever.
What is the key distinction of a third-class lever?
The effort is applied between the fulcrum and the load.
Describe a first-class lever and give an example.
A first-class lever has the fulcrum between the effort and the load. An example is a seesaw.
How is mechanical advantage calculated in a lever system?
Mechanical Advantage = Effort Arm / Resistance Arm.
What mistake should be avoided when using the formula for mechanical advantage?
Avoid using similar incorrect formulas such as addition, multiplication, or subtraction instead of division.
What results in a high mechanical advantage in a first-class lever?
A high mechanical advantage occurs when the effort arm is longer than the resistance arm.
What defines mechanical advantage in a lever system?
The ability of a lever system to move a large load with a small effort due to the effort being further from the fulcrum than the load.
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