Through these experiments, you concluded that:

1. In a third-class lever, as the length of the effort arm is changed, the distance over which the effort must be applied also changes. Because the distance over which this force is applied changes, the effort force also changes.

2. Changing the position of the fulcrum, effort, and load in relation to one another changes the distance over which a load is lifted and effort is applied. The result is a change in the effort force depending upon the lengths of the effort and load arms and position of the fulcrum, load, and effort.

3. When the effort is between the fulcrum and the load, the load arm is always longer than the effort arm. As a result the effort force always exceeds the load force. The closer the effort moves to the load, the longer the effort arm becomes, the less the effort force becomes and the closer the effort force is to matching the load force.

4. Mechanical advantage is equal to 1 when the load and effort force are equal and the length of the load arm and effort arm are equal. As the effort force decreases below that of the load force, mechanical advantage becomes greater than 1. As the effort force increases above that of the load force, mechanical advantage becomes less than 1. As the effort arm becomes longer than then the load arm, mechanical advantage becomes greater than 1. As the effort arm becomes shorter than the load arm, mechanical advantage becomes less than 1.