Levers

There are 3 classes of levers, depending on the effort force, the resistance and in the fulcrum:

•    In the first class lever, the fulcrum is located between the effort force and resistance. Characterized in that the effort force can be less than the resistance, although at the cost of slowing transmitted and the distance traveled by the resistance.

•    In the second class lever, the resistance is between the effort force and the fulcrum. Characterized in that the effort force is always less than the resistance, although at the cost of slowing transmitted and the distance traveled by the resistance.

•         In the third-class lever, the effort force is between the resistance and the fulcrum. Characterized in that the applied force is greater than the resultant, and is used when it is required is to increase the speed transmitted to an object or the distance traveled by it.