Answer:
Newton’s second law of motion
Step-by-step explanation:
The second law of motion gives the direct relationship between the force, mass and acceleration. Its mathematical form is given by :
![F=m* a](https://img.qammunity.org/2020/formulas/chemistry/middle-school/is9g9880wbhtnepofdwu01ppwp8urenxcz.png)
![a=(F)/(m)](https://img.qammunity.org/2020/formulas/physics/college/1ie8p6lmpl0sty9y65jb6f9usdisjhtnwg.png)
It is clear that when mass of the object increases, its acceleration decreases. So, a wagon accelerating more slowly once mass is increased while force remains constant is an example of Newton’s second law of motion. Hence, this is the required solution.