There is no force exerted in the horizontal direction of motion, so, using the physics definition of work, we conclude that no work has been done.
Work Step by Step
This is discussed on pages 110-111.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.