The effort-to-load force in a first class lever is decreased when the distance between the effort and the fulcrum is less than the distance between the fulcrum and the load.
The distinguishing characteristic of first-class levers is that the fulcrum lies between the effort force and the resistance force. Second-class levers have the resistance force between the fulcrum and the effort force. Third-class levers have the effort force between the fulcrum and the resistance force.
disadvantage of first class the fulcrum lies on more effort or more force.
Class 2.
First-class levers and third-class levers tend to be force multipliers. In a first-class lever, the fulcrum is between the effort (applied force) and the load, allowing for mechanical advantage. In a third-class lever, the effort is applied between the fulcrum and the load, amplifying the input force.
In a first-class lever, the fulcrum is located between the effort force and the load. When the effort force is applied on one side of the fulcrum, it can move the load located on the opposite side. Examples of first-class levers include seesaws and crowbars.
The mechanical advantage of a first-class lever depends on the relative distances between the effort force, the fulcrum, and the resistance force. The mechanical advantage is calculated as the ratio of the distance from the fulcrum to the effort force to the distance from the fulcrum to the resistance force.
disadvantage of first class the fulcrum lies on more effort or more force.
When the effort force is decreased, the mechanical advantage must be increased in order to maintain the same level of output force. This can be achieved by either adjusting the length of the lever or using different mechanical systems that provide a greater advantage.
A first-class lever has the fulcrum located at one end and the effort force at the other end. Examples of first-class levers include see-saws and crowbars.
A first-class lever consists of a fulcrum placed between the effort force and the resistance force. Examples of machines that utilize first-class levers include seesaws, crowbars, and scissors.
First levers always follow the order: Load fulcrum effort/force. The load is at one end of the lever and the force is applied at the other end. The fulcrum is somewhere in between the load and force. Scissors are examples of 1st class levers or when elevating one's head above one's chest.
It makes it easier for the effort force [such as your hand] to lift the resistance force [such as a heavy object].