It is a Metaphor.
A wedge
Yes, a knife is considered a simple machine. It is specifically categorized as a wedge, one of the six classic simple machines.
A knife blade is considered a wedge, which is a type of simple machine. When force is applied to the knife blade, it allows for the cutting of materials by separating them along the sharp edge.
simple, you do not.
wedge
no because a knife belongs to a kind of simple machine that is wedge
A knife is not considered a simple machine because its primary function is to cut or slice by applying force to a sharp edge, rather than transferring or transforming mechanical energy as simple machines do. It does not have any moving parts or internal mechanisms that provide mechanical advantage.
A wedge
how does one know if one needs the knife or not? my answer is simple... To be prepared.
It is a type of wedge.
A knife is classified as a simple machine because it has only one function or movement, which is to cut or slice through objects. It utilizes a straight blade for this purpose, making it an example of a simple machine known as a wedge.
The knife had a sheathe included.