
Simple Machines / Classes of Levers

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Physics
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9th Grade
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Hard
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15 questions
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1.
FLASHCARD
Front
What is a simple machine?
Back
A simple machine is a device that changes the direction or magnitude of a force, making work easier. Examples include levers, pulleys, and inclined planes.
2.
FLASHCARD
Front
What are the six types of simple machines?
Back
The six types of simple machines are lever, pulley, inclined plane, wedge, screw, and wheel and axle.
3.
FLASHCARD
Front
What is a lever?
Back
A lever is a rigid bar that rotates around a fixed point called the fulcrum, used to lift or move loads.
4.
FLASHCARD
Front
What are the three classes of levers?
Back
The three classes of levers are: 1st class (fulcrum between effort and load), 2nd class (load between fulcrum and effort), and 3rd class (effort between fulcrum and load).
5.
FLASHCARD
Front
What is the formula for calculating the Ideal Mechanical Advantage (IMA) of a lever?
Back
IMA = distance from fulcrum to effort / distance from fulcrum to load.
6.
FLASHCARD
Front
What is the IMA of a first class lever?
Back
The IMA of a first class lever can be less than, equal to, or greater than 1, depending on the distances from the fulcrum.
7.
FLASHCARD
Front
Which class of lever is most efficient for lifting heavy loads with less effort?
Back
The 2nd class lever is most efficient for lifting heavy loads with less effort.
8.
FLASHCARD
Front
What is the role of the fulcrum in a lever?
Back
The fulcrum is the pivot point around which the lever rotates, allowing the lever to lift or move loads.
9.
FLASHCARD
Front
How does increasing the distance from the fulcrum to the effort affect the IMA?
Back
Increasing the distance from the fulcrum to the effort increases the IMA, making it easier to lift a load.
10.
FLASHCARD
Front
What is an example of a 1st class lever?
Back
An example of a 1st class lever is a seesaw or a crowbar.
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