pulley

/'puli/
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pulley

A worker uses a pulley to lift a heavy crate.

Definition
  1. Noun:
    • A simple machine consisting of a wheel with a groove in which a rope can run: A pulley is a device used to change the direction or point of application of a force applied to a rope or cable. It typically consists of a wheel on an axle, with a groove around its edge to guide the rope.
Usage
  • A pulley is used to lift heavy loads with less effort by redirecting the force.
  • It is a fundamental component in mechanical systems, from construction cranes to exercise equipment.
Examples
  • Noun:
    • They used a pulley to hoist the sail up the mast.
    • The old well had a simple pulley system for drawing water.
    • The mechanic used a block and tackle, a type of pulley system, to lift the car engine.
Advanced Usage

  • "Block and tackle": A system of two or more pulleys with a rope or cable threaded between them, used to lift heavy loads.

    • The sailors used a block and tackle to raise the heavy anchor.

  • "Fixed pulley": A pulley that is attached to a structure and changes only the direction of the force.

    • A flagpole uses a fixed pulley to raise the flag.

  • "Movable pulley": A pulley that moves with the load, providing a mechanical advantage by reducing the force needed.

    • A movable pulley was attached to the crate to make it easier to lift.
Variants and Related Words

  • Sheave (n): The wheel of a pulley, often used in technical contexts.

    • The sheave was worn and needed replacement.

  • Block (n): A housing containing one or more pulleys.

    • The block was secured to the ceiling beam.
Synonyms
  • Sheave: (Specifically the wheel component)
  • Block: (When referring to the housing unit)
  • Tackle: (When referring to a system of ropes and pulleys)
Related Phrases

  • Pulley system: An arrangement of one or more pulleys designed to provide a mechanical advantage.

    • The complex pulley system allowed a single person to lift the piano.

  • Idler pulley: A pulley used to guide or tension a belt or chain without transmitting power.

    • The squeaking noise was coming from a loose idler pulley in the engine.
pulley

A worker uses a pulley to lift a heavy crate.

Noun
  1. a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope

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