A pulley is a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft.

Jan 18, 2022 · A pulley works by changing the direction of the applied force that is manifested at the object. The wheel rotates about its axle when the rope is pulled from one end and the object is raised …

Apr 21, 2025 · Photo: A pulley mounted on a huge lifting frame to make it safer to use. Thanks to the power of pulleys, one person can lift far more than their own weight without straining any muscles, …

Dec 5, 2025 · A pulley is a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim. Pulleys are used singly or in combination to transmit energy and motion.

: a pulley or pulleys with ropes to form a tackle that constitutes one of the simple machines

Discover how pulleys revolutionized engineering—from ancient monuments to modern machines. Learn the theory, history, and practical uses of fixed, movable, and compound pulley systems in this …

Dec 3, 2025 · Pulley, in mechanics, a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim. Pulleys are used singly or in combination to transmit energy and motion.

3 days ago · Tennessee executed Harold Wayne Nichols by lethal injection Thursday in Nashville for the 1988 rape and murder of Karen Pulley, a 20-year-old student at Chattanooga State University. …

3 days ago · Harold Wayne Nichols was sentenced to death in the killing of 20-year-old Karen Pulley.

4 days ago · Tennessee is preparing to execute Harold Wayne Nichols by lethal injection for the 1988 rape and murder of 20-year-old Karen Pulley NASHVILLE, Tenn. -- Tennessee is preparing to …