A wheel and axle system with the highest mechanical advantage has: A. a small wheel and small axle B. a large wheel and a small axle C. a small wheel and a large axle D. a large wheel and a large axle
Most authorities regard the wheel as one of the oldest and most important inventions, which originated in ancient Mesopotamia in the 5th millennium BC (Ubaid period), originally in the function of potter's wheels. [ [ Near the northern side of the Caucasus several graves were found, in which since 3700 BC people had been buried on wagons or carts (both types). The earliest depiction of what may be a wheeled vehicle (here a wagon?four wheels, two axles), is on the Bronocice pot, a ca. 3500 BC clay pot excavated in southern Poland.
The wheel reached Europe and Western Asia in the 4th millennium BC, and the Indus Valley by the 3rd millennium BC. In China, the wheel is certainly present with the adoption of the chariot in ca. 1200 BC, although Barbieri-Low (2000) argues for earlier Chinese wheeled vehicles, circa 2000 BC. Whether there was an independent "invention of the wheel" in East Asia or whether the concept made its way there after jumping the Himalayan barrier remains an open question.
Although they did not develop the wheel proper, the Olmec and certain other western hemisphere cultures seem to have approached it, as wheel-like worked stones have been found on objects identified as children's toys dating to about 1500 BC. Early antiquity Nubians used wheels for spinning pottery and waterwheels. It is thought that Nubian waterwheels may have been ox-driven It is also known that Nubians used horse-driven chariots imported from Egypt.
The invention of the wheel thus falls in the late Neolithic, and may be seen in conjunction with the other technological advances that gave rise to the early Bronze Age. Note that this implies the passage of several wheel-less millennia even after the invention of agriculture. Looking back even further, it is of some interest that although paleoanthropologists now date the emergence of anatomically modern humans to ca.150,000 years ago, 143,000 of those years were "wheel-less". ] ] Auto answered|Score 1|Kristenreed|Points 0|Note:
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A. a small wheel and a small axleExpert answered|amanda39|Points 158|Note:
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Education|No Subcategories|Expert answered|Rating 0| 8/11/2010 2:44:43 PM