HIstory
What do you think the first simple machine was? Throughout history, people have learned ways to increase force, change the direction of force, and increase the rate of work . We don't actually know what the first simple machine was, but it was probably a large stick used to move heavy objects (rocks). Or it could be the sharp rock they used to scrape animal skins.
Some Simple Machines were use early in modern building to move huge rocks by rolling them along. Meantime they became the wheel and axle around 3000 B.C., and were one of the most important inventions in history.
The inclined plane and rollers were used in building the great Egyptian pyramids , one of the Seven Wonders of the World. 2.5 million limestone blocks were moved hundreds of miles over 20 years, weighing 2 to 70 tons each. Ramps over one mile long were required to place stones.
And also Simple Machines were use to build Stonehenge, England.
Some Simple Machines were use early in modern building to move huge rocks by rolling them along. Meantime they became the wheel and axle around 3000 B.C., and were one of the most important inventions in history.
The inclined plane and rollers were used in building the great Egyptian pyramids , one of the Seven Wonders of the World. 2.5 million limestone blocks were moved hundreds of miles over 20 years, weighing 2 to 70 tons each. Ramps over one mile long were required to place stones.
And also Simple Machines were use to build Stonehenge, England.
Evolution of gears
The industrial revolution in Britain in the eighteenth century saw an explosion in the use of metal gearing. A science of gear design and manufacture rapidly developed through the nineteenth century.
Today, the most significant new gear developments are in the area of materials. Modern metallurgy has greatly increased the useful life of industrial and automotive gears, and consumer electronics has driven plastic gearing to new levels of lubricant-free reliability and quiet operation.
Today, the most significant new gear developments are in the area of materials. Modern metallurgy has greatly increased the useful life of industrial and automotive gears, and consumer electronics has driven plastic gearing to new levels of lubricant-free reliability and quiet operation.