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Difficulty: EasyLevers and Fulcrums

Match each everyday tool to its correct lever classification based on the relative positions of the fulcrum, effort, and load.

  • A pair of scissorsFirst-class lever
  • A nutcrackerSecond-class lever
  • A swinging baseball batThird-class lever

Answer

Scissors match with First-class lever, a nutcracker matches with Second-class lever, and a swinging baseball bat matches with Third-class lever.
Each tool can be classified by identifying the component in the middle: Scissors have the fulcrum in the middle (Class 1), nutcrackers have the load in the middle (Class 2), and baseball bats have the effort applied in the middle (Class 3).

Step-by-Step Solution

1
Analyze a pair of scissors
The fulcrum is in the middle, making it a first-class lever.
First-class levers always have the fulcrum positioned between the effort and the load.
2
Analyze a nutcracker
The load is in the middle, making it a second-class lever.
Second-class levers always have the load positioned between the fulcrum and the effort.
3
Analyze a swinging baseball bat
The effort is in the middle, making it a third-class lever.
Third-class levers always have the effort positioned between the fulcrum and the load.

Key Concept

Lever classes are defined by the component that is positioned in the middle: Fulcrum (1st class), Load (2nd class), or Effort (3rd class).
Estimated Time:45s
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Topics

Levers and Fulcrums

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