1. The problem statement, all variables and given/known data I'm writing a paper about wearing jockstraps in sports, and I'm trying to calculate whether the force of an average kick could rupture a testicle (Yeah, it hurts just to even think about). I would like to get the end result in lbs, so I'm using the metric system in the equation and then converting newtons to lbs. I would just like to confirm that I'm calculating this correctly. As a side note, can this be called psi as well? Like if the end result is 77lbs, would that also mean 77 psi? Variables: Average kick speed: 30 m/s (I'm aware that this is the velocity of a kick, but I'm guessing that the average kick will not exceed 30 m/s coming from rest). Average mass of a leg: 11.5 kgs. Testicular rupture occurs at ~110lbs of force 2. Relevant equations F = MA 3. The attempt at a solution F = (30)(11.5) F = 345 Newtons, or ~77lbs.