Answer:
The acceleration will decrease.
Explanation:
According to Newton's second law, acceleration is inversely proportional to mass. As the mass increases (when force is constant), the acceleration decreases. This can be represented in the following formula:
[tex]m = \frac{f}{a} [/tex]
As the mass of the box increases while applying the same amount of force, it will not move as fast as it did when the box contained less mass.
