You grab a book and give it a quick push across the top of a horizontal table. After a short push, the book slides across the table, and because of friction, comes to a stop.
(a) Draw an FBD of the book while you are pushing it.
(b) Draw an FBD of the book after you have stopped pushing it, while it is sliding across the table.
(c) Draw an FBD of the book after it has stopped sliding.
(d) In which of the preceding cases is the net force on the book not equal to zero?
(e) If the book has a mass of 0.50 kg and the coefficient of friction between the book and the table is 0.40, what is the net force acting on the book in part (b)?
(f) If there were no friction between the table and the book, what would the free-body diagram for part (b) look like? Would the book slow down in this case? Why or why not?