1. The problem statement, all variables and given/known data If a block slides w/o friction down a fixed, inclined plane with an angle theta of 30 degrees, what is the block's acceleration? (This problem is an example from my textbook, meaning the solution is available. I am confused on the method that they used. Any clarification is greatly appreciated.) 2. Relevant equations 3. The attempt at a solution I understand the process on how to determine the acceleration, I also understand the that to find velocity you integrate acceleration, I don't understand the purpose of the multiplication by 2(overdot)x. It seems as though its used to manipulate the constant acceleration.