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Questions and Answers
What is the location of the fulcrum in a first-class lever?
What is the location of the fulcrum in a first-class lever?
- Next to the load
- At the end of the lever
- Between the effort and the load (correct)
- Next to the effort
What is the purpose of the mechanical advantage of a lever?
What is the purpose of the mechanical advantage of a lever?
- To decrease the load
- To change the direction of the force
- To increase the effort
- To increase the ratio of output force to input force (correct)
What is the term for the pivot point or point of rotation of a lever?
What is the term for the pivot point or point of rotation of a lever?
- Load
- Effort
- Pivot
- Fulcrum (correct)
Which type of lever has the effort applied between the fulcrum and the load?
Which type of lever has the effort applied between the fulcrum and the load?
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What is the formula for the mechanical advantage of a lever?
What is the formula for the mechanical advantage of a lever?
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Study Notes
Types of Levers
- First-Class Levers: The fulcrum is located between the effort and the load.
- Examples: seesaw, crowbar
- Second-Class Levers: The load is located between the effort and the fulcrum.
- Examples: wheelbarrow, door handles
- Third-Class Levers: The effort is applied between the fulcrum and the load.
- Examples: hammer, tweezers
Characteristics of Levers
- Mechanical Advantage: The ratio of output force to input force.
- Effort: The force applied to the lever.
- Load: The weight or resistance being lifted or moved.
- Fulcrum: The pivot point or point of rotation.
- Distance: The distance from the fulcrum to the effort or load affects the mechanical advantage.
Principles of Levers
- Law of the Lever: The product of the effort and its distance from the fulcrum is equal to the product of the load and its distance from the fulcrum.
- Mechanical Advantage Formula: MA = Load / Effort = Distance of Effort / Distance of Load
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