Explanation:
The correct answer is Inertia because it is the fundamental property of matter that describes an object's resistance to acceleration or changes in its state of rest or motion.
Newton's First Law: Often referred to as the Law of Inertia, this physics principle dictates that an object will naturally maintain its current velocity—whether sitting perfectly still or traveling at a constant speed—unless an outside force acts upon it.
Mass Relationship: The amount of inertia an object possesses is directly proportional to its mass, meaning heavier objects require significantly more force to speed up, slow down, or change directions.
Incorrect Options:
Friction is incorrect because it is an external resistive force generated when two physical surfaces slide or rub against one another, opposing their relative motion.
Gravity is incorrect because it is an attractive fundamental force that pulls objects toward one another based on their mass and physical proximity, rather than an internal resistance to motion.
Momentum is incorrect because it is a vector quantity calculated as the product of an object's mass and its velocity, tracking the total quantity of motion an object possesses rather than its baseline resistance to change.
