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Mecanisms: pulleys - Coggle Diagram
Mecanisms: pulleys
Types of pulleys
Moveable pullyes
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The effort needed to move a load with a
moveable pulley is half oi the effort needed with a fixed pulley. This type of pulley
means we can hft weights with less effort.
Compound pulleys
This is a set of fixed and moveable pulleys, often called a block and
tackle. If we use more pulleys it becomes more complex, but less effort is needed to move the load.
Fixed pulleys
A fixed pulley is a wheel that has a groove for a rope, cham or belt to go round lt. It rotates around an axle that ls fixed to an immobile surface. This reduces the load. R, when effort ,F, is applied.
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Pulley trains with belts
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Pulleys 2 and 3, attached to the same axle, rotate at the same velocity.
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The motion of pulley 3 is transmitted to pullev 4 via the belt that
connects them. All the pulleys rotate in the same direction.
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