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The Wheel and axle, lever,and inclined plane
Sources
http://www.icurio.com/goExternal?np=/templates/sections/external/external.ftl&pp=/templates/sections/framework/error.ftl&evlCode=3653026229631217m37Cpb&productName=icurio&al=Middle
Compare and Contrast
These simple machines are a like because they are all simple machines, and the are made to make work a little easier for humans. They are diffent because they all work different some requires less hand work than others, and some lessen the force that you have to use.
All about the inclined plane.
The inclined plane was made by the greeks. It is used to raise and lower loads. The inclined plane is used to move heavy loads.
How a inclined plane works.
The inclined plane has less friction when moving a object up hill but increases the distance. The force is reduced, is equal to the ratio of the length on the sloped surface to the height it spans.
The Wheel and Axle,Lever,and Plane
All About the Lever
The lever is a type of simple machine. Today we have alot more civilized types of levers. A lever is a simple machine consisting a metal bar that rotates around a fixed point. The lever was mad in the Greek times. The fixed point
is called a falcrum .The first lever was used by the Egeptians. No single identifire has been found.
How the lever works
The history of the Wheel and Axle
The lever consist of a beam or a ridid rod pivoted at a fixed hinge, or falcrum. On the basis of the location of the falcrum, load and effort, the lever is divided into three types. The lever amplifies an input force to provided a greater output force.
The Wheel & Axle is one of six simple machines. The Greeks made the Wheel & Axle.
The oldest known wheel & axle was found in the year 2002. It is dated to be between 5,100 and 5,350 years old.
The earliest well-dated description of a wheeled vehicle is (a wagon with four wheels and two axle) Bronocice pot excavated in a Funnelbeaker culture settlement in southern Poland.
How the Wheel &Axle work
The wheel and axle is generally considered to be a wheel attached to a axle so these two parts rotate together in which a force is transferred to one to the other. The wheel and axle is used to lift weights or weighted items. The wheel and axle can also be apart of a pulley. It provides mechanical advantages it in which you can wind up the rope you can used or it can be used as a doorknob