ok, ive been at this for quite some time. its pretty difficult for me and need some help fast. The question is A 2kg box lies at rest on an incline of 30 degrees with a friction of .2 . The box slides down, and compresses a spring of k=10n/m. What is amount of forces that shoots up the box and at what speed? How far does the box go? picture of the problem is at http://panda.rightclicked.net/untitled.bmp Just need to know how exactly i would go about this, because I am not sure what equation to use.