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Simple Machines: Wheel & Axle and Inclined Plane
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Easy Work
The whole point of a Inclined Plane is to decrease stress on the body while lifting. Instead of direct lifting you slowly rise up with less despair.
Inclined Plane
http://www.ohio.edu/people/williar4/html/haped/nasa/simpmach/Inplane.htm
Inclined Plane
a plane inclined at an angle to the horizontal.
a sloping ramp up which heavy loads can be raised by ropes or chains.
http://www.dictionary.com/browse/inclined-plane
Easy Work
In around 3500 B.C. people were having problems with transporting goods over land. The Wheel & Axle was invented to make it easier to transport items and it still does.
http://www.livescience.com/49106-simple-machines.html
Wheel & Axle
Joreid
a simple lifting machine consisting of a rope that unwinds from a wheel onto a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.
http://www.dictionary.com/browse/wheel-and-axle