Paint can not protect moving parts as it is not smooth or oily enough. Moving parts that are extremely close together need polymer oils to keep them moving.
A simple machine doesn't have any moving parts.
They don't have moving parts.
They are called simple machines.
it has no moving parts
Yes, although it is not practical. Slight misplacement of tape can cause bad paint jobs and paint on moving parts anyway. Also, the adhesive of the tape is not good for the moving parts.
Oil and grease is used to eliminate friction between moving parts.
Ideal Machine
There are no moving parts, therefore it is not a machine. A chair is an object.
oil
Ideal Machine
Adding oil to the moving parts of machines can do that because it makes it smoother and takes the rust off of it.
Inclined plane. Otherwise known as a wedge.