Newton's First Law says that an object at rest will remain at rest, and an object in motion will remain in motion unless it is acted on by an outside force. This is the law of

inertia.

inertia.

In other words, inertia is the tendency of an object to resist changes in its motion. If an object is not experiencing any external forces, it will either stay at rest or continue moving in a straight line at a constant speed. This law is also known as the law of inertia.

inertia.

To understand how Newton's First Law explains inertia, let's break it down:

1. Object at rest: According to Newton's First Law, if an object is not moving (at rest), it will remain at rest unless acted upon by an outside force. This is because the object's inertia resists any change in its state of rest.

2. Object in motion: Similarly, if an object is already in motion, it will continue to move in a straight line at a constant velocity unless acted upon by an outside force. This is also due to its inertia.

Inertia is the property of matter that causes objects to resist changes in their motion. The more mass an object has, the greater its inertia. Hence, objects with more mass require more force to change their state of rest or motion.

Overall, Newton's First Law describes how objects tend to maintain their state of rest or motion until an external force is applied. This law is fundamental to understanding the behavior of objects and is the basis for many concepts in physics.