Definition

Noun: A simple machine consisting of a wheel attached to a central axle. When force is applied to the wheel (e.g., by turning it), it causes the axle to rotate, transmitting the force and providing a mechanical advantage. This allows a relatively small force applied to the wheel to move a heavier load attached to the axle's rope or shaft.

Usage

The term "wheel and axle" refers to the complete machine system. It is used to describe the fundamental mechanism and its principle of operation. * The wheel and axle is one of the six classical simple machines. * A doorknob is a common example of a wheel and axle, where the knob is the wheel and the central rod is the axle. * The mechanic explained how the wheel and axle in the winch allows for easier lifting.

Examples

• The ancient well used a wheel and axle to raise buckets of water from great depths.
• In physics class, we calculated the mechanical advantage of a wheel and axle.
• The principle of the wheel and axle is applied in devices like steering wheels, windlasses, and fishing reels.

Advanced Usage

• Conceptual Use: The term can be used to describe the core functional principle of a system, even if the components are not visibly a traditional wheel and axle.
  • The gear system in the clockwork is essentially a sophisticated application of the wheel and axle concept.

Variants and Related Words

• Wheel (n): A circular object that revolves on an axle and is used for movement or transmission of force.
• Axle (n): A rod or spindle passing through the center of a wheel or group of wheels.
• Winch (n): A machine that uses a wheel and axle mechanism, specifically with a rope or cable wound around the axle or drum, for hoisting or pulling.
• Windlass (n): A specific type of winch, often hand-operated, used for lifting weights.

Synonyms

• Simple machine
• Hoisting mechanism (in the specific context of lifting)
• Rotary lever (describing its mechanical principle)

Related Phrases

• Mechanical advantage: The factor by which a machine multiplies the force put into it, a key characteristic of a wheel and axle.
• Fulcrum and lever: The principle of another simple machine (the lever) to which the wheel and axle is often compared, as it operates on a similar rotational principle.

Noun

1. hoist so arranged that a rope unwinding from a wheel is wound onto a cylindrical drum or shaft coaxial with the wheel