Pascal, the famous French philosopher and mathematician is often given the credit for this invention. I do not know the details or if there are competing claims from other inventors.
It is wheelbarrow.
Because rain had fallen on the wheelbarrow
A wheelbarrow is a lever and wheel and axle, so it is a compound machine.
Rainwater
Necessity is the mother of all invention. Inventors invent because they or someone else has a need for something that does not exist.
Yes.
There is a lot of uncertainty to who in fact was the first to invent the Wheelbarrow, however, China is the nation that currently holds the claim having stated that they were the first to invent the Wheelbarrow, in the Han Dynasty (206BC-220AD). Egypt and Greece also have respectable claims, however, historical evidence still points at China as the nation who invented the Wheelbarrow.
It is unknown which person specifically invented the ancient Chinese wheelbarrow. My guess is that multiple people contributed ideas to make it work.
a wheelbarrow
It is wheelbarrow.
Kelvin Wheelbarrow goes by Ol' Wheelbarrow.
Because rain had fallen on the wheelbarrow
Because rain had fallen on the wheelbarrow
Rainwater
Because rain had fallen on the wheelbarrow
Rainwater
Yes.