A falling weight impacts on a block of material serving as a bumper. choose a material that offers the largest energy absorption capacity for a given Volume. It is required that the bumper snould not yield. Available materials are Steel, brick, PMMA, PTFE, CORK, and polyurethane al what is the appropriate Coefficient of performance? What would its slopebe? b$)$ list materials in the orde of performance $($best to worst$)$ c$)$ with respect to the coelfficient of performan and the Ashby Chart below, how would you expect polyurethane to compare to cork? Assume polyurethine is $100$ times stronger than cork but $10$ times soft than cork. Justify Answer $($Hint$)u=\frac{{}^{2}v}{\text{d}\text{e}\text{l}\text{E}}=\frac{S{y}^{2}V}{2E}$