Welcome to track and field! I am Henry, a world champion.
So, you want to know how newtons 2nd law applies to track?
Let's get started.
when a track runner wants to go at maximum speed, they must take into account their own mass, and how fast they can accelerate. then, they multiply their mass by their acceleration, and then they know how much force it will take to run at their fastest. Say they way 20 pounds and they accelerate at 20 mph. the problem would look like this: 20x20=F. F stands for force. if you solved it, it would look like this: 20x20=400. the 400 is how much force their feet would need to carry and use to make them run at their fastest. that is Newtons 2nd law.
Now you know. oh no! I'm going to be late for practice! bye!