student lifts a set of books off a table and places them in the upper shelf of a book case which is 2 meters above the tabie. If she applies a force of 5 newtons to lift these books, what is the work done?
• A. 0 joules
O B. 2.5 joules
• c. -2.5 joules
• D. 10 joules
• E. -10 joules
