What happens when you add more pulleys?

Adding more pulleys to a system increases the mechanical advantage, allowing a smaller effort to lift a heavier load. This is because more pulleys distribute the weight of the load and reduce the force needed to lift it. However, while it makes lifting easier, it also requires more distance to pull the rope through, as the load moves a shorter distance compared to the length of rope pulled. Thus, while you can lift heavier objects with less force, the trade-off is increased rope length and effort in terms of distance.