PULLEYS
fixed pulleys
compound pulleys
moveable pulleys
it rotates around an axle that is fixed to an inmobile surface
is balanced when the effort F is equal to the load R
what is? : is a wheel that has a groove for a (rope, chain or belt) to go round it.
belt
chain
rope
Pulleys are used to raise and lower loads easily
USES: wells, gym equipment
is balanced when it fulfils this equation: F: R/2
has two pulleys
can move in a linear direction while the other is fixed
is fixed while the other can move in a linear direction
The effort needed to move a load with a moveable pulley is half of the effort needed with a fixed pulley
This type of pulley means we can lift weights with less effort.
If we use more pulleys it bei.omes more complex, but less effort is needed to move the load
USES: : ln passenger lifts, goods lifts, cranes
is a set of fixed and moveable pulleys, often called a block and tackle