Levers Definition A simple machine A board or

Levers

Definition • A simple machine • A board or bar that rests on a turning point called the fulcrum • Used to change the amount, the strength and the direction of movement. • The position of the force and the load can be changed by moving them to different points on the lever.

Definition • The position of the force and the load can be changed by moving them to different points on the lever. • An object that a lever moves is called the load or load force. • The force used to move a lever is called the effort force. • The closer the object is to the fulcrum, the easier it is to move.

1 st Class or Class 1 Lever • The load force and the effort force are separated by the fulcrum • As one moves up the other moves down. • The amount and the strength of the movement is depends on the distance from the fulcrum http: //www. hometrainingtools. com

Remember: The force that is pushing down is the EFFORT FORCE The force of the load or weight is the LOAD FORCE

2 nd Class or Class 2 Lever • The load force is between the effort force and the fulcrum. • This lever uses mechanical advantage to make moving large weights easier. http: //www. hometrainingtools. com

Remember: The force that is pushing down is the EFFORT FORCE The force of the load or weight is the LOAD FORCE

3 rd Class or Class 3 Lever • The effort force is between the fulcrum and the load. • Mechanical advantage is reduced but more movement is possible. http: //www. hometrainingtools. com

Remember: The force that is pushing down is the EFFORT FORCE The force of the load or weight is the LOAD FORCE

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