## Conceptual Physics (12th Edition)

Published by Addison-Wesley

# Chapter 7 - Think and Solve: 47

#### Answer

In an ideal case, input force multiplied by input distance equals output force multiplied by output distance. The output force just balances the piano's weight. $$(F_{in})(2 m) = (5000 N)(0.2 m)$$ $$F_{in} = 500 N$$ This is discussed on page 120.

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.