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 the same speed and direction.
* Acceleration is a change in velocity. This change can be in speed or direction.
* To overcome inertia and accelerate an object, a force must be applied. This force will act in the opposite direction of the desired acceleration.
Example:
Imagine pushing a heavy box across the floor. You need to apply force to overcome the box's inertia and get it moving. The box's inertia resists your force, causing friction between the box and the floor. This friction is a force opposing the acceleration you're trying to achieve.
In summary: Inertia isn't a specific force itself, but it's the underlying principle that causes forces to resist acceleration.
