Definition

1. Noun:
   • Pulley: A simple machine consisting of a wheel that rotates on an axle, with a grooved rim designed to guide a rope, cable, or chain. It is used to change the direction of an applied force or to lift heavy loads with less effort.

Usage Examples

• Noun:
  • Họ dùng ròng rọc để kéo thùng hàng nặng lên tầng hai. (They used a pulley to lift the heavy crate to the second floor.)
  • Hệ thống ròng rọc giúp việc treo cờ trở nên dễ dàng. (The pulley system makes hoisting the flag easy.)
  • Đây là một loại ròng rọc cố định. (This is a type of fixed pulley.)

Advanced Usage

• "Hệ thống ròng rọc" / "Palăng": A pulley system or block and tackle, which combines multiple pulleys to provide a mechanical advantage.
  • Thợ xây dựng sử dụng palăng để nâng các dầm thép. (Construction workers use a block and tackle to lift steel beams.)

Variants and Related Words

• Ròng rọc động (n): A movable pulley, where the pulley moves with the load, providing mechanical advantage.
• Ròng rọc cố định (n): A fixed pulley, where the pulley is attached to a stationary point, changing only the direction of the force.
• Bánh xe có rãnh (n): Grooved wheel (a descriptive term for the core component of a pulley).

Synonyms

• Pulley: The direct equivalent.
• Sheave: Another term for the wheel within a pulley.
• Block: The housing containing one or more pulleys.

Related Concepts

• Simple Machine: A basic mechanical device, such as a pulley, lever, or inclined plane, that provides a mechanical advantage.
• Mechanical Advantage: The factor by which a machine multiplies the force or effort applied to it.

verb

1. to flow abundantly