So I have been researching, I'm no genius, on how to measure the force of a moving object. Now I have seen some of the equations and newtons law and all but what I am specifically trying to do is figure out the impact force of an arrow. eventually this will be calculated into how much force of an arrow is being created per pound of draw on different bows. Measuring the poundage of the draw is easy with a spring weight scale. That is not in question. Though I am having a hard time knowing if I am about to go at this at the right angle. So I am thinking about making a rudimentary accelerameter on a large enough scale that I can hit the weighted end with an arrow. and I am thinking about making a way so that the swing arm the "weight" is attached to pushes a magnet along a compass style scale. much like making the paper version with a string and a nut. So that I can know the peak amount of acceleration force on impact. Now I know how to build all these items an what not, but I need to know what all I use for measuring it into foot pounds of force on impact, or if this design would even work. Any and all suggestions are more then welcome.