You Push Your Physics Book Across a Table

Multiple Choice

You push your physics book across a table. The book weighs 8 N, you push with a steady 5 N force, and the force of friction against the book is 3 N. You push the book a distance of 2 m. The amount of work you do on the book is

A) 6 J.
B) 10 J.
C) zero.
D) 16 J.
E) impossible to tell without more information.