The inclined plane or ramp was invented in ancient times so nobody has credit for inventing or designing the ramp but it is known that the early Egyptians used the ramp to build their pyramids.
This is not known. The ancient Egyptians used them to build pyramids, but the Sumerians may have done it earlier.
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a hatchet is a inclined plane
A ramp is an inclined plane because an inclined plane is a set of a surface set at an angle that is not a right angle. In which a ramp is an inclined plane!
The thread running around the screw is an inclined plane. If you were to straighten it out, it would be an inclined plane. The screw itself can be considered a combination of wedge and inclined plane.
an inclined plane can be use as ramp
The slope of an inclined plane is found by dividing the rise of the plane by the run of the plane. also the ideal mechanical advantage.