How a Block and Tackle Works - HowStuffWorks
How do pulleys work? A pulley is a wheel on an axle designed to assist in the movement of heavy loads. A one-wheel pulley allows you to change the direction of the force you have to apply to lift the load by pulling down to lift a load upwards.
How do pulleys work? - Explain that Stuff
2023年11月17日 · If you need to lift huge weights, don't strain your back: use the power of science—and an amazing device called a pulley. Let's take a closer look at how they work! Photo: A giant floating crane (top) uses huge pulleys to recover the rusting wreck of the Golden Ray (bottom) in St. Simons Sound.
Wheel-Axle and Pulleys | Simple Machines - YouTube
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! (https://www.khanacademy.org/science/mh-grade-6-science?lang=en)...
What is a Pulley? - Simple Machines | Science for Kids - YouTube
2012年2月14日 · https://mocomi.com/ presents: What is a Pulley?Pulley is a simple machine and comprises of a wheel on a fixed axle, with a groove along the edges to guide a ...
The Pulley - Simple Machines - YouTube
2020年6月23日 · This physics video tutorial provides a basic introduction into the pulley - a simple machine that offers a mechanical advantage by increasing the force neede...
Pulleys – Simple Machines for Kids - Inventors of Tomorrow
2016年9月26日 · Learn about the types of pulley systems, the theory of simple machines and how pulleys make work easier, and lots of great fun hands-on play for kids.
Design Squad - How Does a Pulley Work? Video - PBS KIDS
How Does a Pulley Work? A pulley is a simple machine using a wheel and a cord that's designed for lifting.
How Does A Pulley System Work? - Sciencing
2023年3月16日 · A pulley system makes it easier to lift an object than lifting the weight by hand. A single pulley essentially changes the direction of the pull or force applied. When a person uses two or more pulleys in a system, then the system also multiplies the force applied in addition to changing direction.
What is a pulley? What work do pulleys do? - CK-12 Foundation
A pulley is a simple machine that uses a wheel with a groove in it and a rope. The rope fits into the groove and one end of the rope is attached to the load. When you pull on the other end, the wheel turns and the load moves.
What is a Pulley? - Physics for Kids - Mocomi
Learn what a pulley is - a simple machine that reduces the time and energy taken to lift heavy objects through this animated learning video.