(Hand-held) Pencil sharpener, and an Axe.
A simple machine is a (to its name) simple machine, used to complete a task that is uncomplicated. Such as the first example, a pencil sharpener. It has a small razor, and you turn a pencil inside to shave off unnecessary wood.
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My second example is a wedge. A hatchet (or axe) is a wedge, it pushes between two sides and increases force, therefore, breaking it apart.
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Good luck! :)
~pinetree