1. The problem statement, all variables and given/known data An object is pulled at a constant F. KE0+PE0=0, so W=PE+KE. If there were no friction, the slope of a graph (KE+PE=Y-axis, W=X-axis) would be 1 and the y-intercept would be 0. What would the addition of friction do to the slope and y intercept (would the y intercept be more, less, or equal to 0 and the slope more, less, or equal to 1) 2. Relevant equations KE0+PE0+W=PE+KE 3. The attempt at a solution At first I thought that the slope would be less than 1 and the y intercept below 0, since my experimental results seemed to confirm this and since friction would be "taking" energy away. However, one of my classmates told me there should be no change. Can anyone explain this problem to me?