* Basic Principle: A wedge is essentially an inclined plane that is used to separate objects or to split something.
* Force Direction: When you apply force to the top of a wedge, that force is directed downward. The wedge then redirects this force outward and sideways, pushing the objects apart.
* Example: Think about splitting a log with an axe. The force you apply to the axe is downward, but the axe's wedge shape redirects that force to split the log horizontally.
In short, a wedge acts as a force multiplier and a directional changer. It amplifies the force you apply and redirects it to create a splitting or separating effect.