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. In simpler terms:

* More force = More acceleration

* More mass = Less acceleration

* Applying it: Since both objects experience the same force, the lighter object will have a higher acceleration because it has less mass to overcome. This means it will speed up faster.

Example: Imagine pushing a small toy car and a large truck with the same amount of force. The toy car will accelerate much faster than the truck because it has less mass.