I'm working on a demonstration of where I want to show the equivalent result of impacts of two separate masses. I'd like to make sure I am understanding these concepts correctly (it's been more than a few years since my college level physics class). An object weighing 100kg moving at a velocity of 20 m/s has a KE of 20,000J To get the equivalent KE from an object that weighs 10kg, I've calculated a velocity of 63.25m/s Now, here's my uncertainty: does this mean that an impact of the 100kg object moving at 20m/w would create the same amount of damage as the 10kg object moving at 63.25m/s? Assuming that the materials are the same, so the impact distance and rebound would be equivalent. Or are there other factors involved? Thanks in advance.