Need help with Conservation of E problem ASAP! Please Help! Hey I have a test coming up and this is a problem that will be on the test. I think I have an idea of how it works but I can't really figure out how to do it. I know it's a conservation of energy problem but there is nothing like it anywhere I have looked. Any help would be appreciated but a walkthrough would really help. When a certain rubber ball is dropped froma height of 1.25 m onto a surface, it loses 18.0% of its mechanical energy on each bounce. a) how high will the ball bounce on the first bounce? I took 1.25(.18) and then subtracted this from 1.25 to get 1.03 which is the answer. b) how high will it bounce on the second bounce. I took 1.25(2(.18)) and subtracted this from 1.25 to get .8 but the book says .841 so I'm not sure what is going on there. c) with what speed would te ball have to be thrown downward to make it reach its original height on the first bounce? Here is my real problem. If I add 1.25(.18)+1.25+.841 I get 2.32 which is the answer but I know that's not how it is done. If there is a part I need to understand it is this one. Can anyone help me? Please?