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en.wikipedia.org/wiki/Lever

A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the location of fulcrum, load and effort, the lever is divided into three types. It is one of the six simple ...

quatr.us/physics/types-lever-simple-machines-physics.htm

Aug 17, 2017 ... All levers fall into one of three types of lever. How can we tell which lever is in which class? Well, a first-class lever is a stick where the fulcrum is in between the weight and the energy moving the weight (your hands, for example). Some common first-class levers are see-saws, crowbars, and pliers. A pair of ...

www.school-for-champions.com/machines/levers_classess.htm

Three Lever Classes. by Ron Kurtus (revised 26 July 2016). There are three types or classes of levers, according to where the load and effort are located with respect to the fulcrum. Since humans usually provide energy to levers, "effort" and "load" are often used instead of input and output. Class 1 has the fulcrum placed ...

www.softschools.com/examples/simple_machines/class_one_lever_examples/511

The image below is an example of a Class One Lever, sometimes called a First Class Lever. Examples of Class One Lever: All classes of levers have four basic parts: ... Some simple machines are made up of two Class One Levers such as scissors and pliers. The cutting ends of the scissors is the location of the load, which ...

www.innerbody.com/image_musc04/musc73.html

The first class lever is one of three classes of levers and is one possible arrangement of muscles, bones, and joints found in the human body. While less common in the body than second and third class levers, the first class lever system is found in the neck at the atlanto-occipital joint and in the elbow joint. AnatomyIn a first ...

www2.vernier.com/sample_labs/STEM2-02-COMP-first-class_levers.pdf

A lever is a simple machine used to make work easier. It can help you move heavy objects by increasing the force you exert. A lever consists of a long, rigid bar with a support that allows the bar to pivot. The point where the bar pivots is the fulcrum. There are three classes of levers: first, second, and third. A first-class lever ...

sciencing.com/levers-used-everyday-life-8435160.html

Apr 24, 2017 ... A lever is a rigid object that rests on a pivot point, known as a fulcrum. Levers make it easier to lift materials, remove tight objects and cut items. A first-class lever has a fulcrum in the center, between the effort (or force) and the load, which is the object or objects you are trying to move. A second-class lever ...

www.reference.com/science/examples-first-class-levers-68c721a48f84f52a

Examples of first-class levers include a balance scale, a seesaw and a crowbar. A first-class lever places the fulcrum in the middle of the effort and the load....

www.ee.nmt.edu/~tubesing/missionpossible/simplemachines.pdf

Load or. Resistance. Effort or. Applied Force. Fulcrum. First Class Lever. Second Class Lever. Load or. Resistance. Effort or. Applied Force. Fulcrum. Load. Applied. Force. Force. Action. Force. Action. Other First Class. Lever Examples. Spring http://library.thinkquest.org/J002079F/lever.htm ...