Here's why:

* Newton's Second Law of Motion: This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Mathematically:

* F = ma (Force = mass × acceleration)

* Rearranging the equation: We can solve for acceleration:

* a = F/m

This equation shows that for a constant force (F), the acceleration (a) is inversely proportional to the mass (m). This means:

* Smaller mass = Greater acceleration

* Larger mass = Smaller acceleration

In simpler terms: If you push a heavy object and a light object with the same force, the lighter object will move much faster (accelerate more) because it has less inertia to overcome.