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en.wikipedia.org/wiki/Lever

A lever is a machine consisting of a beam or rigid rod pivoted at a .... for the 1st class lever, the r esistance is in the middle for the 2nd class lever, and the e ffort is in the middle for the 3rd class lever.

www.humankinetics.com/excerpts/excerpts/levers-work-to-create-movement-in-the-human-body

Levers are typically labeled as first class, second class, or third class. All three types are found in the body, but most levers in the human body are third class.

alexeinstein.wordpress.com/2014/09/03/lever-of-human-body

Sep 3, 2014 ... Lever second class , the load is between the pivot and the effort (force) and ... The fingers and hand are a class one, two or three lever system ...

www.innerbody.com/image_musc04/musc73.html

The first class lever is one of three classes of levers and is one possible ... the body than second and third class levers, the first class lever system is found in the ...

anatomyandphysiologyi.com/lever-systems-bone-muscle-relationships

Jul 11, 2014 ... A wheelbarrow demonstrates this type of lever system. Second-class levers are uncommon in the body, but the best example is the act of ...

www.exrx.net/Kinesiology/Levers.html

Movement in the body is produced by a system of levers. ... Second Class Lever ... Note: shovelling and rowing actions can also be first class lever systems if the ...

www.ask.com/youtube?q=2nd+Class+Lever+Systems&v=eTa2EFd3JF0
Sep 28, 2013 ... Enumerate the main uses of levers Identify the three classes of lev... ... but a small corretion a clawhummer nail system is a second class lever.
www.ask.com/youtube?q=2nd+Class+Lever+Systems&v=d1wS_OlJzmI
Jan 20, 2016 ... Joints and levers in the human body Bones, ligaments, and muscles are the ... Levers are typically labeled as first class, second class, or third class. ... that I've come across this video I do understand the bone lever system.

health.uottawa.ca/biomech/courses/apa2313/statics2.pdf

Lever system consists of: • lever. • fulcrum. • load. • force. • Three classes of levers . 1. first class (a) - pry bars, crowbars. 2. second class (b) - wheelbarrow.