Final answer:
The property of matter that resists a change in motion is called inertia. Inertia is the tendency of an object to remain at rest or remain in motion at a constant velocity unless acted upon by an external force. It is related to an object's mass.
Step-by-step explanation:
The property of matter that resists a change in motion is called inertia. Inertia is the tendency of an object to remain at rest or remain in motion at a constant velocity unless acted upon by an external force.
For example, if you push a book with a small force, it may not move because it has a large inertia. However, if you push it with a greater force, the book will overcome its inertia and start moving.
Inertia is related to an object's mass. Objects with more mass have more inertia. For instance, a large boulder has more inertia compared to a basketball.