1. The problem statement, all variables and given/known data A 200 g wood block is firmly attached to a horizontal spring. The block can slide along a table where the coefficient of friction is 0.40. A force of 10 N compresses the spring 18 cm. If the spring is released from this position, how far beyond its equilibrium position will it stretch on its first swing? 2. Relevant equations (I've listed the equations and variables/given data in my attempt!) 3. The attempt at a solution The following is my attempt at solving this problem, but my issue is that one of my friends got a different answer (0.17 m). I tried it another way and got his answer but I don't know which one is correct (there's no answer key). The other equation I used was (F - μmg)/k = x which gave me 0.17 m. But I found this equation on Yahoo Answers and I'm not sure exactly how they got it. Mine looks right, but is it? Thanks in advance!