1. The problem statement, all variables and given/known data Answer included: 2. Relevant equations Ff = μFn, where mu can be kinetic or static. Fnet = ma Fg = mg I think that's it. 3. The attempt at a solution I got the first part, I need help with acceleration. There's no evidence that I tried the second part I guess, as I have no idea what to do. How can you get μk using the Ff static and μs? How are Ff kinetic and Ff static connected? To answer the second part, you need Ff kinetic which I have no idea how to get. Where did my teacher get the assumption that μk = 0.37? I have a unit test tomorrow on forces. NEXT QUESTION: 1. The problem statement, all variables and given/known data 2. Relevant equations cosine law sin law Fnet = ma Ff = μFn, where μ can be kinetic or static. Fg = mg I think that's it. 3. The attempt at a solution So I drew the FBD, and found that Fgx = 50.99 and Fgy = 239.89. I placed the vectors head to tail and found the resultant, which was 249.719 using cosine law. I then used sine law to find the angle opposite to the 160 vector, and subtracted 15 degrees to get the resultant degree going NW (I got 6.99 degrees). Divide 249 by the mass to find acceleration. I know I haven't incorporated friction, and I'm trying it again right now. The reason I'm posting it still is because I'm REALLY short on time and I want this answered in case I fail again. Note: My teacher said he was in a rush when answering the questions, so there's a chance that they're wrong. Thanks.