Main Difference
The main difference between Lever and Pulley is that the Lever is a one of the six simple machines and Pulley is a simple machine; wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable.
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Lever
A lever ( or US: ) is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the location of fulcrum, load and effort, the lever is divided into three types. It is one of the six simple machines identified by Renaissance scientists. A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever.
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Pulley
A pulley is a wheel on an axle or shaft that is designed to support movement and change of direction of a taut cable or belt, or transfer of power between the shaft and cable or belt. In the case of a pulley supported by a frame or shell which does not transfer power to a shaft, but is used to guide the cable or exert a force, the supporting shell is called a block, and the pulley may be called a sheave.
A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain.
Hero of Alexandria identified the pulley as one of six simple machines used to lift weights. Pulleys are assembled to form a block and tackle in order to provide mechanical advantage to apply large forces. Pulleys are also assembled as part of belt and chain drives in order to transmit power from one rotating shaft to another.
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Lever (noun)
A crowbar.
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Lever (noun)
A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; — used for transmitting and modifying force and motion.
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Lever (noun)
A small such piece to trigger or control a mechanical device (like a button).
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Lever (noun)
A bar, as a capstan bar, applied to a rotatory piece to turn it.
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Lever (noun)
An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
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Lever (noun)
A levee.
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Lever (verb)
To lever.
“With great effort and a big crowbar I managed to lever the beam off the floor.”
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Lever (verb)
To lever (physically).
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Lever (verb)
To lever (in an abstract sense).
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Lever (verb)
To increase the share of debt in the capitalization of a business.
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Lever (adverb)
Rather.
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Pulley (noun)
One of the simple machines; a wheel with a grooved rim in which a pulled rope or chain will lift an object (more useful when two or more pulleys are used together, as in a block and tackle arrangement, such that a small force moving through a greater distance can exert a larger force through a smaller distance).
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Pulley (verb)
To raise or lift by means of a pulley.
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Lever (noun)
a rigid bar resting on a pivot, used to move a heavy or firmly fixed load with one end when pressure is applied to the other
“a tyre lever”
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Lever (noun)
a projecting arm or handle that is moved to operate a mechanism
“a control lever”
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Lever (noun)
a means of pressurizing someone into doing something
“rich countries use foreign aid as a lever to promote political pluralism”
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Lever (verb)
lift or move with a lever
“she levered the lid off the pot with a screwdriver”
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Lever (verb)
move (someone or something) with a concerted physical effort
“she levered herself up against the pillows”
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Lever (verb)
use a lever
“the men levered at the coffin with crowbars”
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Lever (verb)
pressurize (someone) to do something
“another sticking point is the money that will be required to lever the unions into accepting a deal”
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Pulley (noun)
a wheel with a grooved rim around which a cord passes, which acts to change the direction of a force applied to the cord and is used to raise heavy weights.
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Pulley (noun)
a wheel or drum fixed on a shaft and turned by a belt, used for the application or transmission of power.
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Pulley (verb)
hoist with a pulley
“the tree house was built on the ground and pulleyed into the branches”