Newton's First Law

An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

A state of rest or balance due to the equal action of opposing forces.

It will move in a straight line indefinitely.

It will continue moving at a constant velocity.

Forces acting on an object that combine to form a net force that is not zero, causing the object's motion to change.

The net force is zero.

The overall force acting on an object when all the individual forces are combined.

The tendency of an object to resist changes in its state of motion.

A book resting on a table, where the force of gravity is balanced by the normal force from the table.

A car accelerating when the engine applies more force than friction.