Work Done by Librarian on 2.2kg Book

[DeeAussie]

A librarian lifts a 2.2kg book from the floor to a height of 1.25m. He carries the book 8.0m to the stacks and places the book on a shelf that is 0.35m above the floor. How much work does he do on the book?

 

[Sirsh]

Hey DeeAussie, Well you seem to have all the correct pieces of information. All you have to do is apply it to the Formula for Work, where in this case it is W =Fs, where F = mg.

W = work, F = Force, s = distance i.e. the height and the distance walked, m = mass, g = gravity.