pulley system

Scientific Enlightenment:

In mechanics, a typical pulley is a disc that can rotate around a central axis. The surface of the disc has a groove, and the rope is wound around the groove. If you pull on either end of the rope, the rope will rotate with the disc.Friction will encourage the smooth wheel.The wheel rotates around the central axis. The pulley is actually a deformed, movable lever. The main function of the pulley is to pull.Load, change the direction of force, transmit power, etc. A mechanical composed of multiple pulleys is called a "pulley system" or "compound pulley." The pulley system "Machinery has greater benefits, capable of hauling heavier loads. A pulley can also be used as a...Chain driveComponents with drive transmission, which transmit power from one rotating shaft to another. According to whether the center axis of the pulley moves, the pulley can be divided into “Fixed pulley"动滑轮"翻译为"pulley"; "定滑轮的中心"翻译为"center of the fixed pulley"。The axis of the fixed pulley remains stationary, while the center axis of the moving pulley can move. Each has its own advantages and disadvantages. When the fixed pulley and the moving pulley are assembled together, they form a pulley system. A pulley system not only saves effort but also allows for the change of the direction of the force. The pulley appears as a knowledge point in the junior high school physics textbook, requiring an understanding of the direction of force, the distance of the rope end, and the concept of mechanical advantage.Answer questions about work done and other issues.

Science Project:

1. 1. Recognize and prepare the necessary materials for the experiment.
2. 2. Assembly is completed in accordance with the instructions step by step.
3. 3. Assembly completed and debugging is underway.

Scientific Principles:

A pulley system is composed of a certain number of fixed pulleys and moving pulleys, along with ropes that pass around them. A pulley system has the function of saving effort and changing the direction of force, and is an important component of hoisting machinery. The number of ropes sharing the load of the pulley system is called the working line number. Usually, the name of the pulley system is indicated by the number of fixed pulleys and moving pulleys that make up the system. For example, a pulley system composed of four fixed pulleys and four moving pulleys is called a four-four pulley system.

A fixed pulley can change the direction of the force, but it cannot make it easier to pull an object. A moving pulley cannot change the direction of the force, but it can make it half as easy to pull an object. A pulley system combines a fixed pulley with a moving pulley, so it can change the direction of the force and make it easier to pull an object. If the additional work done by the pulley system is not considered, the more moving pulleys used, the easier it is to pull.