1. The problem statement, all variables and given/known data My friend and I are attempting to figure out what the coefficient of friction is of a stack of paper (say, 100 sheets). Through our research, we've found that the coefficient of friction ([tex]\mu[/tex]) is the maximum possible static friction force (F) divided by the normal force (Fn). Normal force is the opposite of the mass (ma) of the object times that object's gravitational acceleration (g). Our problem is that we're not sure how to find the "maximum possible static friction force" (or what, exactly, that is), and how to account for the multiple pieces of paper. The paper on the bottom of the stack will be weighed upon by all the paper above it, which would affect how frictional the papers are. How exactly would we go about finding this out? 2. Relevant equations [tex]\mu[/tex] = F / Fn Fn = - ma * g (that's not an "m" because that would be "meters") 3. The attempt at a solution We're not really sure how to begin - that's the problem.