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pul⋅ley

 /ˈpʊli/ Show Spelled Pronunciation [pool-ee] Show IPA-noun, plural -leys.1.a wheel, with a grooved rim for carrying a line, that turns in a frame or block and serves to change the direction of or to transmit force, as when one end of the line is pulled to raise a weight at the other end: one of the simple machines.2.a combination of such wheels in a block, or of such wheels or blocks in a tackle, to increase the force applied.3.a wheel driven by or driving a belt or the like, used to deliver force to a machine, another belt, etc., at a certain speed and torque.

pul·ley (pŏŏl'ē)

n. pl. pul·leys

  1. A simple machine consisting essentially of a wheel with a grooved rim in which a pulled rope or chain can run to change the direction of the pull and thereby lift a load.

  2. A wheel turned by or driving a belt.

[Middle English poley, from Old French polie and from Medieval Latin poliva, both ultimately from Greek polos, axis; see kwel-1 in Indo-European roots.]

pulleyScience Dictionarypulley (pl'ē) Pronunciation Key

A machine consisting of a wheel over which a pulled rope or chain runs to change the direction of the pull used for lifting a load. Combinations of two or more pulleys working together reduce the force needed to lift a load. See also block and tackle.

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What is the definition of simple pulley?

A simple pulley is a basic type of pulley that consists of a wheel with a groove around its circumference and a rope or cord that runs through the groove. It is used to change the direction of a force or to lift or lower an object.


What is the definition of fixed pulley?

A fixed pulley is a type of pulley that is attached to a stationary object, such as a ceiling or wall. It changes only the direction of the force applied to it, without providing any mechanical advantage. Fixed pulleys are commonly used to redirect the path of a rope or cable.


What is the definition of a pulley third grade?

A pulley is a simple machine that consists of a wheel with a groove around its circumference where a rope or belt can run. It is used to lift or move objects by applying force to the rope or belt, making work easier.


What is the velocity ration of a pulley?

The velocity ratio of a pulley system is the ratio of the rotational speed of the driving pulley to the driven pulley. It indicates how the speed of the driven pulley relates to the speed of the driving pulley. The formula is: Velocity Ratio = Diameter of driving pulley / Diameter of driven pulley.


How do you calculate velocity ratio in a pulley?

To calculate the velocity ratio in a pulley system, divide the diameter of the driving pulley by the diameter of the driven pulley. This ratio indicates how much faster or slower the driven pulley rotates compared to the driving pulley. It helps to determine the speed or force transmission in the pulley system.

Related Questions

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A device used to lift something heavy. By using a pulley, you half the effective weight.


What is the definition of hoisting?

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What is the definition of simple pulley?

A simple pulley is a basic type of pulley that consists of a wheel with a groove around its circumference and a rope or cord that runs through the groove. It is used to change the direction of a force or to lift or lower an object.


What is the definition of pulleys?

A pulley is a wheel on an axle that is designed to support movement of a cable or belt along its circumference.


What is the definition of fixed pulley?

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What is a compound pulley?

a coumpound pulley is when there is a fixe pulley and movable pulley working together


What is compound pulley?

a coumpound pulley is when there is a fixe pulley and movable pulley working together