An object that resists movement by a force is said to have inertia.

Here's why:

* Inertia is the tendency of an object to resist changes in its motion. This means an object at rest wants to stay at rest, and an object in motion wants to stay in motion at a constant speed and direction.

* Force is a push or pull that can change an object's motion.

* Resistance is the opposition to the force.

So, when a force is applied to an object, the object's inertia will resist the change in motion. The greater the mass of the object, the greater its inertia and the more it will resist movement.