Final answer:
Newton's first law deals with inertia, which is the tendency of an object to resist any change in its motion. It states that an object at rest will remain at rest and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.
Step-by-step explanation:
Inertia:
Newton's first law deals most closely with inertia. Inertia is the tendency of an object to resist any change in its motion. According to Newton's first law, an object at rest will remain at rest and an object in motion will continue in motion with a constant velocity unless acted upon by an external force.
Example:
If you slide a book on a table, it eventually comes to a stop. This happens because of the force of friction acting on the book. The book's inertia keeps it moving until friction slows it down and eventually stops it.
Velocity and Rotational Motion:
Although velocity and rotational motion are related to motion, they are not the main focus of Newton's first law. Velocity is defined as the rate at which an object changes its position in a specific direction, while rotational motion deals with objects that spin or rotate.
Learn more about Newton's first law and inertia