pulley. lever. wedge. screw.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Many common hand tools create a mechanical advantage by using the basic principles found in simple machines. For example, a screwdriver uses the principles of the wheel and axle. In order to increase gripping force, pliers use the principle demonstrated in the
Possibilities:
- pulley.
- lever.
- wedge.
- screw.

lever.