Thumbnail: Weight (W), the frictional force (Fr), and the normal force (Fn) impacting a cube. Weight is mass (m) multiplied by gravity (g). Image used with permission (CC-SA-BY-3.0; Email4mobile).
The OpenStax College name, OpenStax College logo, OpenStax College book covers, OpenStax CNX name, and OpenStax CNX logo are not subject to the creative commons license and may not be reproduced without the prior and express written consent of Rice University. For questions regarding this license, please contact email@example.com. "Download for free at http://cnx.org/contents/031da8d3-b52...firstname.lastname@example.org."