http://www.webassign.net/yf9/7-21.gifYou and three friends stand at the corners of a square whose sides are 8.0 m long in the middle of the gym floor, as shown in the figure below. You take your physics book and push it from one person to the other. The book has a mass of [COLOR=red]1.0[/COLOR] kg, and the coefficient of kinetic friction between the book and the floor is µ_k = [COLOR=red]0.35[/COLOR].

Since this is your homework assignment... how did you go about figuring it out and what answer did you get?