## Physics for martial arts students

Right after the kickboxing class, I saw one of classmate and friend of mine trying to solve a physics exercise. I studied physics in high school, and I had a exam in college; it was long time ago and even at that time I wasn’t very strong in the matter (and I used to soothe myself (or to fool myself?) quoting Linus Torvalds “While in physics you’re supposed to figure out how the world is made up, in computer science you create the world.” But that’s a different story), but I decided that I could help, after all it didn’t sound too difficult.

### The problem

The problem required finding the final velocity (rounded at one decimal digit), $v_f$ of a ball thrown down from a 40 meters tall tower with a initial velocity, $v_0$, of 12 m/s. The exercise book was providing also the solution: 30.5 m/s. Read more of this post