Force Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.Anti-spam check. Do not fill this in! === Normal === [[File:Incline.svg|right|thumb|''F''<sub>N</sub> represents the [[normal force]] exerted on the object.]] {{main|Normal force}} When objects are in contact, the force directly between them is called the normal force, the component of the total force in the system exerted normal to the interface between the objects.<ref name=Cutnell>{{Cite book |last1=Cutnell |first1=John D. |title=Physics |last2=Johnson |first2=Kenneth W. |date=2004 |publisher=Wiley |isbn=978-0-471-44895-2 |edition=6th|location=Hoboken, NJ}}</ref>{{rp|264}} The normal force is closely related to Newton's third law. The normal force, for example, is responsible for the structural integrity of tables and floors as well as being the force that responds whenever an external force pushes on a solid object. An example of the normal force in action is the impact force on an object crashing into an immobile surface.<ref name=FeynmanVol1 />{{rp|at=ch.12}}<ref name=Kleppner /> Summary: Please note that all contributions to Christianpedia may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here. You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see Christianpedia:Copyrights for details). Do not submit copyrighted work without permission! Cancel Editing help (opens in new window) Discuss this page