You and your friends are building a treehouse, and you need a machine to get a heavy load of wood from the ground to the top of the tree. you set up a pulley system that allows you to pull down on the rope to lift the wood. what type of pulley system was this and how did it make work easier? question 9 options: fixed pulley by changing the direction of input force. movable pulley by decreasing input force but not the direction.

Machines are systems that are built to carry out a certain function or work. These are classified as: Simple and Compound Machines.

Simple machines are simple tools used to accomplish a certain task. These include lever, pulley, inclined plane atc. In contrast compound machines are a combination of simple machines.

In the given scenario, a pulley system was used to carry the wood from the bottom to the tree top. This is a movable pulley system which is directly attached to the load and works by decreasing the input force but not the direction.

it is the most commonly accepted one