Hello readers! I have a question for you: My father designs and builds post pounders (machines similar to pile drivers use to "pound" wooden fence posts into the ground). He has had great success building new and innovative pounders and would like to know just how hard they are capable of hitting (very handy when it comes to R&D and further improving his design). Lets assume that we were to manufacture an artificial "post" that was, for all intents and purposes, immovable (say heavy walled steel, driven into bedrock and cemented), to act as our control (right?). Question: How would you go about accurately measuring the force of impact? We think we know an approximate figure, +/- 110,000 lbs/sq inch - but this conclusion was likely drawn up on the shop floor with chalk. The only method I have conceived was to "pound" a known quantity of specific metal/alloy (lets say, a 10x10x10 cm lead block) against our "control" post and calculate the impact based on deformation. Then again, much of my knowledge of physics comes from the Big Bang Theory and Wikipedia - and hence don't know if one can deduce the force this way. We have tried calculating the force mathematically but in my mind there are just way too many variables within his design, furthermore we lack the equipment to accurately measures these variables (like rate of acceleration or mass for example). Any ideas? Thank you so much. Cheers everyone.