1. The problem statement, all variables and given/known data Find K at 4m, besides the F.s graph they also give me Kinitial = 2J 2. Relevant equations W=F.d and W=Kf- Ki 3. The attempt at a solution The first thing I did was to find the area under the graph. 1/2(4)(2)=4J W=F.d so that's my work. Then I replaced that 4J into the other eq W= Kf-Ki then solved for Kf. W+Ki=Kf plugging in values 4j +(2J)=Kf then 6J=Kf Is that correct guys? Thanks for your help!