block and tackle

Thân thiện

A sailor uses a block and tackle to lift a heavy crate onto the ship.

Definition

Noun: A block and tackle is a system of two or more pulleys (called blocks) with a rope or cable threaded between them. It is used to lift or pull heavy loads with less effort by providing a mechanical advantage. The rope is wound around the pulleys to create multiple lines supporting the load, which multiplies the force applied.

Usage

The term "block and tackle" refers specifically to the complete assembled system. It is a singular compound noun.

Examples: * The sailors used a block and tackle to hoist the sail. * A simple block and tackle can make moving heavy equipment much easier. * The mechanic rigged a block and tackle from the ceiling to lift the engine out of the car.

Advanced Usage

• The mechanical advantage of a block and tackle is determined by the number of rope segments supporting the moving block.
• In technical contexts, the configuration (e.g., "gun tackle," "luff tackle") may be specified, but the general term remains block and tackle.

Variants and Related Words

• Block (noun): A single pulley housed in a casing.
• Tackle (noun): In this context, the assembly of ropes and pulleys used for lifting. (Note: "Tackle" has other, unrelated meanings in sports and fishing).
• Pulley system (noun phrase): A more general term for any arrangement of pulleys and rope.
• Hoist (noun/verb): A device or the action of lifting something, which may use a block and tackle mechanism.

Synonyms

• Pulley system
• Tackle (in the nautical/mechanical sense)
• Hoisting gear

Related Idioms or Phrases

• To rig a block and tackle: To set up or assemble the pulley system.
  • They rigged a block and tackle to the tree branch.
• (No common idioms use "block and tackle" figuratively; it is a technical term.)

Học thuật

Noun

1. pulley blocks with associated rope or cable