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some are, others are made of plastic, it all depends on the manufacturer
They can be traced back to ancient China. See the related link for more information.There is archeological evidence that the ancient Greeks had wheelbarrows about 2400 years ago in 407 B.C. The Chinese are known to have wheelbarrows about 600 years later, around 210 A.D.
To take advantage of leverage.
Longer the handle-the more leverage
There are many Greek inventions that are still used today. Some of these include the alarm clock, central heating, the thermometer, maps, cannons, as well as wheelbarrows.
Because longer handles distribute weight more evenly, as apposed to shorter handles which are for lighter objects that don't require the same weight distribution.add. And the length between the handles and the wheel axle may be considered as a lever, with the load carried in between.[note. Chinese wheelbarrows of old used to have the wheel under the load, which makes for a more maneuverable wheelbarrow, but suited really to smooth country.]
Leverage. The longer the handle, the easier it is to lift the load.
Long handles came into being to help with handicapped people. The long handles are now a requirement on any new doors in commercial buildings.
All hardware stores sell wheelbarrows. Ace sells a range of wheelbarrows starting at 60$ for a small wheelbarrow. They also sell heavy duty carts and wheelbarrows.
There are 15 wheelbarrows that are in one tipper.
Depends really how big the wheelbarrows are and how much they weight.
No Romans did not use wheelbarrows the wheel barrows were practicaly invented after.
some are, others are made of plastic, it all depends on the manufacturer
Wheelbarrows are used to tansport heavy or otherwise unyieldy loads. They were instrumental in technological advancement.
Wheelbarrows are used by construction workers, landscapers, gardeners and a few other similar occupations,
According to the weblink below, there were 40 wheelbarrows on the First Fleet.
18