A slide loving pig slides down a certin 35 degree slide in twice the time it would take to slide down a frictionless 35 degree slide. What is the coefficient of kinetic friction between the pig and the slide? Here is what I have so far.... [sum]Fx=ma=mgsin [the] -[mu]mgcos[the] I canceled out the mass on both sides and get [sum]Fx=a=gsin [the] -[mu]gcos[the] For the y forces I have [sum]y=N=mgcos[the] As far as the difference in the time with or with out friction I have x=mgsin[the]=(1/2)a[tex]t^2[/tex] for the slide with no friction and I have x=mgsin[the]=2a[tex]t^2[/tex]for the slide with friction This is all the info I have been able to come up with...I can't figure out how to put it all together. Thanks for helping. I've been working on this one for awhile.