I was thinking about the physics of a punch (not that I´m interesting in getting into a fight). I was wondering what would enter into consideration. Obviously the formula F= m.a is the key, but it´s clear that there are some factors that are involved, like the grip you have on the floor (if you were standing over a skateboard the punch would suck), and the pressure (I guess if you can concentrate all the force into a tiny spot, it would be better). So, I was thinking that if you were to throw a side uppercap and your ellbow acted as the pivot point and is really steady to resist the reaction of the inpact you´d still be conditioned by how much mass you happen to have in your fist, and the rest would be how much you could accelerate that mass. What would be the key then? how much momentum you can get in there before it hits the target? Also, are there any keys to messure the grip?