Why Does a Water Wheel Rotate? The Principle Explained

[Gayle]

Water wheels are typically constructed in areas with rapid water flow, utilizing the upstream current to drive their motion. The bamboo tubes function similarly to turbine blades: they harness the impact force of water (provided by its kinetic energy/velocity), converting this energy into rotational motion of the water wheel. This rotation overcomes both the frictional resistance of the wheel and the counter-torque generated by lifting water. Below is relevant information about water wheels: 1. Introduction: The water wheel, an irrigation tool, represents a hydraulic-powered mechanical device ingeniously developed by ancient Chinese laborers. Historical records indicate its emergence during the Eastern Han Dynasty. As a vital component of China's agricultural heritage, it embodies the creativity of the Chinese nation, testifies to China's agricultural civilization, and serves as valuable evidence for hydrological research history. The invention of water wheels laid the foundation for societal stability and prosperous livelihoods. 2. Structure: Standing over 10 meters tall, the wheel features a 5-meter-long central axle (0.5m in diameter) supporting 24 wooden spokes radiating outward. Each spoke tip carries both a scooping plate and water bucket - the former for directing water flow, the latter for water containment.