Levers
Flashcard
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a lever?
Back
A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum. It is used to lift or move loads with less effort.
2.
FLASHCARD QUESTION
Front
What are the three classes of levers?
Back
The three classes of levers are: 1) First-class lever (fulcrum in the middle), 2) Second-class lever (load in the middle), 3) Third-class lever (effort in the middle).
3.
FLASHCARD QUESTION
Front
What is the formula for calculating the Ideal Mechanical Advantage (IMA) of a lever?
Back
IMA = Length of effort arm / Length of load arm.
4.
FLASHCARD QUESTION
Front
What is the IMA of a first-class lever?
Back
The IMA of a first-class lever can vary depending on the position of the fulcrum, effort, and load.
5.
FLASHCARD QUESTION
Front
What is the IMA of a second-class lever?
Back
The IMA of a second-class lever is always greater than 1, as the effort arm is longer than the load arm.
6.
FLASHCARD QUESTION
Front
What is the IMA of a third-class lever?
Back
The IMA of a third-class lever is always less than 1, as the load arm is longer than the effort arm.
7.
FLASHCARD QUESTION
Front
Give an example of a first-class lever.
Back
A seesaw is an example of a first-class lever, where the fulcrum is in the center.
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