ròng rọc
Học thuậtThân thiện
Definition
- 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.