Levers Next.

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Levers Next

Definition 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. Next http://www.cool-science-projects.com/images/man-and-lever.jpg

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. Back Next http://currentreports.info/wp-content/uploads/2009/02/firce_class_lever_drawing1.gif

The closer the load force is to the fulcrum, the easier it is to move. The position of the effort force and the load can be changed by moving them to different points on the lever. The closer the load force is to the fulcrum, the easier it is to move. The load force is easier to lift because it is closer to the fulcrum Effort Force Back Next http://library.thinkquest.org/C004451F/firstclasslever1.gif

1st 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 Back Next http://www.hometrainingtools.com

1st Class Levers Back Next LOAD http://shadowwar.files.wordpress.com/2009/06/see-saw1.jpg http://www.constructionknowledge.net/general_technical_knowledge/images_gen_tech_knowledge/lever%20figure%201_3.gif http://www.professorbeaker.com/images/levers2.gif http://www.worsleyschool.net/science/files/lever/firstexample.JPG

2nd 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. Back Next http://www.hometrainingtools.com

2nd Class Levers Back Next http://library.thinkquest.org/C004451F/secondclasslever2.jpg http://www.cdxetextbook.com/images/leveradvantage_02.jpg http://www.professorbeaker.com/images/levers2.gif http://www.factmonster.com/images/ency196levers002.jpg

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

3rd Class Levers Back Next Effort http://www.professorbeaker.com/images/levers2.gif http://www.factmonster.com/images/ency196levers003.jpg http://www.worsleyschool.net/science/files/lever/thirdexample.JPG http://www.personal.psu.edu/jlw1086/crosby.jpg

Review: Classes of Levers Back Next

Review: Classes of Levers First Class Second Class Third Class Back http://www.professorbeaker.com/images/levers2.gif