1. The problem statement, all variables and given/known data This is my first time posting here guys so correct me if I am wrong. This question was on my test and I wanted to know if I did it right. There is a block of mass m and it is moving at a certain velocity before pressing against a spring which compresses distance x. Find Change in Kinetic Energy Change in Potential Energy Is this a conservative energy. Why? Energy lost to Friction Coefficent of Friction. 2. Relevant equations KE = 1/2mv^2 PE of Spring = 1/2kx^2 3. The attempt at a solution I dont know the exact measurements for the variables but I used the kinetic energy formula to find intial KE and the final should be 0 because it turns into Potential correct? I got negative for that. I found change in potential by setting intial to 0 and using the equation. I then noticed that kinetic and potential weren't equal and potential was smaller so there was no conservation of energy. The loss in energy is friction? I then used this to find the coefficent. Is this correct?