1. A combined pulley makes things easier because the effort needed to lift the load is less than half the weight of the load.
1.1. But the rope you pull on travels a farther distance.
1.2. The three combined pulleys where the object is shown have different imas depending on how many ropes supporting the load.
2. a fixed pulley makes work easier by changing the direction of the force.
2.1. it helps you lift an object upward.
2.2. a fixed pulley does not rise and fall with thte object being lifted.
2.3. How to find the IMA= you either count the number of ropes supporting the load, or you can find the length of the rope you were pulling and divide it by the length away the ground is.
2.4. In the object shown in the side only has one supporting rope so the ideal mechanical advantage is 1.
3. A movable pulley is a pulley that moves with the load.
3.1. The movable pulley allows the effort to be less than the weight of the load.
3.2. In the object shown the movable pulley has two supporting ropes for the IMA.
