Wheel and Axle

Jesus VillanuevaMike Ortiz

Steven CastellanoHarvey Vazquez

Team : DOGE 101

Professor DavidianJanuary 6, 2015

Wheel and Axle

• A wheel is a circular object that revolves on an axle and is fixed below a vehicle or other object to enable it to move easily over the ground

• An Axle is a rod or spindle (either fixed or rotating) passing through the center of a wheel or group of wheels.

http://www.thinglink.com/scene/396687035139620865

Examples

http://www.thinglink.com/scene/396687035139620865

http://pixgood.com/wheel-and-axle-examples-simple-machines.html

Different Types of Uses

• Bicycles• Steering wheel• Ferris wheel• Carriages • Yo-yos • Pencil Sharpener• Screwdriver http

://www.infovisual.info/05/img_en/034%20Crank%20gear.jpg

Other Types

http://www.scielo.br/img/revistas/jbsmse/v28n4/07f1.gif

http://www.buzzle.com/images/diagrams/wheel-axle-examples.jpg

History

• The earliest well dated wheeled vehicle is on the Bronocice pot.

• The first wheel and axle was from around 4000BC when the Sumerians were beginning to live in cities.

• 300 years later in tribes of central Asia began making wagon wheels, which would need to have an axle to function.

Effects on Environment and People

• The wheel and axle is a great invention in human history because it makes the job easier for every person in the world like for transportation, moving objects. Without a wheel and axle we wouldn’t be able to move heavy objects to a different place.

• When having a wheel and axle combination you’re also creating an environment where there is less friction in place that is resisting your movement.

Applications

• Ever since the beginning, civilizations like Egypt, Rome, and China used the concept of wheel and axle to help with monumental and everyday structures.– Production and transportation of goods

• Wagons• Pottery

– Defenses• Chariots• Cannon Holder

– Welfare• Wells

Applications

• Even now in modern society, the usage of wheel and axle has grown.

• Transportation• Automobiles• Bicycles• Airplanes• Wheel Chairs• Boats

• Energy Source• Hydrogen Power

• dams • Wind Power

• windmills • Doorknobs

Pros vs. Cons

• Pros – The Mechanical advantage – The reduction of force needed for work– The convenience of space

Pros vs. Cons

• Cons– Not applicable in all terrain • Without modifications

– Contamination

Mechanical Advantage

• Mechanical advantage is the force amplified by the usage of the tool or tools.

• The mechanical advantage is the relationship between the force and distance inputted and outputted by the wheel and axle and is directly related to the radius of the wheel and the axle.

Mechanical Advantage

Symbol Meaning

MA Mechanical Advantage

Rw Radius of wheel

Ra Radius of Axle

References

• http://hyperphysics.phy-astr.gsu.edu/hbase/mechanics/lever.html

• http://www.buzzle.com/articles/simple-machine-wheel-and-axle.html

• http://www.gethiredbyfire.com/mechanical-aptitude-2/• http://en.wikipedia.org/wiki/Wheel_and_axle• http://www.britannica.com/EBchecked/topic/641655/w

heel-and-axle

Thank You