It's a simple lever.
The stairs alone are not. A lever is a simple machine that is used to lift an object up easier because instead of pulling up against gravity you are pushing down with it but still lifting the same weight. A lever needs to have a pivot point which stairs don't have. This pivot point is called the fulcrum. Stairs are actually considered an incline plane, another type of simple machine.
What kind of simple machine is a garage door
If the piano is going up the stairs, an inclined plane. If it is going up through the window, a pulley.
The answer is pulleyl
God, its called the sun.
Screw, even though it has no moving parts. the spiral stairs of the Statue of Liberty are an oft-quoted example.
Wedge and inclined plane
Screw, even though it has no moving parts. the spiral stairs of the Statue of Liberty are an oft-quoted example.
A set of winding stairs loosely resembles an Archimedes screw.
a wedge
Using the stairs is a simple and convenient form of light exercising.
YES
maching by chemical action
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maching by chemical action
chordophone !