Show me the steps to solve Your physics book is resting in front of you on a horizontal table in the campus library. You push the book over to your friend, who is seated at the other side of the table, 0 . 4 0 0 m north and 0 . 3 0 0 m east of you. If you push the book in a straight line to your friend, friction does - 6 . 4 J of work on the book. If instead you push the book 0 . 4 0 0 m due north and then 0 . 3 0 0 m due east, how much work is done by friction