Forces44.pdf - Three rules that help to establish the...

Info icon This preview shows page 1. Sign up to view the full content.

Three rules that help to establish the direction of frictionless contact forces are: (1) When one of the two contacting surfaces is flat , the force must act perpendicular to the flat surface; (2) When two solids contact along sharp edges, the contact force must be perpendicular to both edges. (3) When two curved surfaces contact, the reaction force acts along a line joining the centers of curvature of the two objects. Forces acting at rough (infinite friction) nonconformal contacts A rough nonconformal contact behaves somewhat like a pinned joint. There can be no relative motion of the contacting surfaces, therefore there must be three components of reaction force acting on both contacting solids. Unlike a pin joint, however, the contact can only sustain a repulsive normal force. This means that the components of force shown in the picture must satisfy 0 A N . If the normal force is zero (eg when the two surfaces are about to
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern