Force exerted perpendicular to the surface of an object is called normal force.

Here's a breakdown:

* Normal in this context means "perpendicular."

* Force is a push or pull that can cause a change in motion.

Example:

Imagine a book resting on a table. The table exerts an upward force on the book, preventing it from falling through the table. This upward force is perpendicular to the surface of the table and is called the normal force.

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