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en.wikipedia.org/wiki/Lever

A lever is a 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. .... The lever operates by applying forces at different distances from the fulcrum, or a ...

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

Jul 26, 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 ...

Mar 19, 2013 ... Check out us at:http://www.tutorvista.com/content/physics/physics-i/power-energy -machines/levers.php Three Classes of Levers The basic ...

www.enchantedlearning.com/physics/machines/Levers.shtml

Many of our basic tools use levers, including scissors (2 class 1 levers), pliers (2 class 1 levers), hammer claws (a single class 2 lever), nut crackers (2 class 2 ...

quatr.us/physics/machines/lever2.htm

May 2016 - All levers fall into one of three types of lever. A first-class lever is a stick where the fulcrum is between the weight and the energy moving the weight  ...

www.technologystudent.com/forcmom/lever1.htm

PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET BASED ON EXERCISE BELOW. Levers are used to lift heavy weights with the least amount of effort.

sciencing.com/ten-different-types-levers-7285923.html

Apr 24, 2017 ... Levers consist of an inflexible pole (bar) that pivots on a fulcrum. Levers come in three classes---first, second and third class---each requiring an ...

www.bbc.co.uk/schools/gcsebitesize/design/systemscontrol/mechanismsrev1.shtml

A lever is the simplest kind of mechanism. There are three different types of lever. Common examples of each type are the crowbar, the wheelbarrow and the ...

ib.bioninja.com.au/higher-level/topic-11-animal-physiology/112-movement/types-of-levers.html

Muscles and bones act together to achieve a variety of movement by forming different types of levers. A lever consists of four main parts: lever arm, fulcrum, force ...

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