Here's why:
* Inertia is the tendency of an object to resist changes in its motion. This means a more massive object is harder to start moving, stop, or change direction.
* Mass is a measure of the amount of matter in an object. It's directly related to inertia - the greater the mass, the greater the inertia.
Newton's Second Law of Motion is the key equation that connects inertia (mass) to force and acceleration:
F = ma
Where:
* F is the net force acting on the object
* m is the mass of the object (representing its inertia)
* a is the acceleration of the object
In summary, you don't calculate inertia directly. You use the object's mass in equations like Newton's Second Law to understand its resistance to changes in motion.
