Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 8 - Think and Explain: 66


The lever arm is the shortest distance between the applied force (i.e., the line along which the force acts) and the rotational axis. This is discussed on page 139, and examples are shown in Figures 8.19-8.20. In the first case, the lever arm is the length of the pedal sprocket arm. In the second case, the vertical position, the lever arm is zero. The line of action of the pushing force passes directly through the rotational axis.
Update this answer!

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.