You have to have the right size pulley for the weight of the object you want to move and a secure place to attach it. Then, once it's all hooked up, you'll need to generate the force to pull on the rope or cable that will then move your object. If it is more than you can produce with your body, you can attach an engine to it and let it do the work.
You cannot use an overhead fixed pulley, or class 1 pulley, to singlehandedly lift something heavier than yourself, since you do not have enough weight to offset the object you are lifting. By definition, a fixed pulley is a single pulley that does not move - it is anchored. You could ask a friend to help you pull on the rope, and if the two of you weigh more than the object, then you could lift the object with a single overhead fixed pulley.
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You could use a fixed pulley that was mounted on a wall at chest height to singlehandedly lift something heavier than you. The rope would loop from the weight up to the pulley, and then make a right angle turn at the pulley and stretch out across (parallel to the ground) to your hands. By bracing one of your feet against the wall, if you are strong enough, you can use the leverage you gain from your foot braced against the wall to pull on the rope with enough force to lift an object heavier than yourself.
use a small effort
The fixed pulley only changes the direction of the force applied.
single fixed pulley, single movable pulley and single fixed and movable pulley. :-)
multiply
There are fixed, moveable, and compound pulleys.
Single Pulley
A fixed pulley.
A flagpole has one pulley, although if the item on the flagpole is heavier than an actual flag, then you may need 2.
A movable pulley. Kind of anticlimactic, isn't it?A pulley that is attached to something that isn't moving is called a fixed pulley.
An example of a fixed pulley would be a well. This is a fixed pulley because the pulley doesn't move even though it is attached to an object.
A fixed pulley is a pulley that is attached to a support. It does not reduce the effort needed to lift the load, but rather changes the direction of the applied force.An example of a fixed pulley would be the rope pulley on a well. This is a fixed pulley because the pulley doesn't move (it is attached to the overhead structure).
the disadvantage of a fixed pulley is not to push it down and up
A fixed pulley is A wheel turned by or driving a belt.
A fixed pulley changes the direction of the force.
Mechanical advantage of a fixed pulley
Movable pulley is attache to the object you are moving while Fixed Pulley changes direction of the applied force.LaDy_caRoLi "Christine carren alcantara"
The disadvantage of a fixed pulley is that if it's not fixed in a location where you need it, it's used less.
The fixed pulley only changes the direction of the force applied.