Fixed Pulley
![Picture](/uploads/2/6/1/7/26179430/9138404.png)
A fixed pulley is a pulley that has a wheel and axle that does not move. Fixed means fixed in place or unmovable.
In the picture on the left, the red arrow is our force that does the work on the weight. The greater the force is, the more work you can do!
The blue arrow is our load, or the weight that we are trying to lift with our pulley. The heavier that weight is, the more work you have to do!
In the picture on the left, the red arrow is our force that does the work on the weight. The greater the force is, the more work you can do!
The blue arrow is our load, or the weight that we are trying to lift with our pulley. The heavier that weight is, the more work you have to do!
Movable Pulley
![Picture](/uploads/2/6/1/7/26179430/1810305.png?176)
A movable pulley is actually attached to the weight it is trying to move! You can move the pulley back and forth by using force on one end of the rope!
The red arrow is still our force that shows us where we need to pull to make the simple machine work. Notice how this one points up instead of down. When we did the experiment in class we had to pull up on this type of lever to move the weight along the rope.
The blue arrow is the weight of our object that we are trying to move. The heavier this is, the harder we have to pull on our end of the rope! Look below for an example!
The red arrow is still our force that shows us where we need to pull to make the simple machine work. Notice how this one points up instead of down. When we did the experiment in class we had to pull up on this type of lever to move the weight along the rope.
The blue arrow is the weight of our object that we are trying to move. The heavier this is, the harder we have to pull on our end of the rope! Look below for an example!
![Picture](/uploads/2/6/1/7/26179430/2772760.png?369)
This well uses a pulley to get water out of the ground! The leather bowl you can see in the picture gets lowered all the way down to the water in the well. It is very light on the way down and would not take much force to bring back up. But wait! When it is full of water it weighs more than twice of what it weighed before! Now it is much harder to pull up and you need a lot more force to use the pulley.
Use the arrows to navigate through the simple machines or you can pick any one you want by clicking on the images above.