fulcrum

/'fʌlkrəm/
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fulcrum

The child places the fulcrum under the long wooden plank to lift the heavy rock.

Definition

Noun: 1. The pivot point about which a lever turns: The fixed point on which a lever rests or is supported and which provides the point of rotation when a force is applied. 2. A thing that plays a central or essential role in an activity, event, or situation: Something that serves as a crucial support or balancing factor.

Usage and Examples
  • Noun (Physical Pivot):
    • The fulcrum of the seesaw must be precisely centered for it to balance.
    • In physics class, we learned that moving the fulcrum closer to the load requires less effort to lift it.
  • Noun (Figurative Support):
    • Trust is the fulcrum of any strong relationship.
    • The new evidence became the fulcrum for the defense's argument in the trial.
Advanced Usage
  • "To serve as a fulcrum": To act as the central point of support or change.
    • The treaty served as a fulcrum for improved diplomatic relations between the two nations.
Variants and Related Words
  • Fulcra (n): The standard plural form of "fulcrum," especially in technical or scientific contexts.
    • The machine had multiple fulcra to distribute the force.
  • Fulcrums (n): An accepted plural form, common in general use.
Synonyms
  • Pivot: The central point, pin, or shaft on which a mechanism turns.
  • Axis: A real or imaginary straight line on which an object rotates or is symmetrically arranged.
  • Hub: The central part of a wheel, rotating on or with the axle; often used figuratively for a center of activity.
Related Phrases and Idioms
  • "Lever and fulcrum": Often used together to describe the complete mechanical system, symbolizing the principle of using a point of support to gain a mechanical advantage.
    • Archimedes understood the power of the lever and fulcrum.
  • "Fulcrum of power": A phrase describing the central point from which power or influence is exerted.
    • The capital city was the fulcrum of power for the ancient empire.
fulcrum

The child places the fulcrum under the long wooden plank to lift the heavy rock.

Noun
  1. the pivot about which a lever turns

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