On the physical sample of “ discontinuous differential equations ”












0












$begingroup$


The following source contains several physical examples: https://arxiv.org/pdf/0901.3583.pdf.



How can I get the differential equation in "Example 2: Brick on a frictional ramp"? How can I grasp this as a math student?




$$
dot{v}(t) = g(sin theta) − nu g(cos theta) text{sign}(v(t))
$$




Moreover, do you think there is a physical form of the equation in "Example 3: Non-smooth harmonic oscillator"? (like exp 2.)



Thank you very much in advance for your answers.










share|cite|improve this question











$endgroup$

















    0












    $begingroup$


    The following source contains several physical examples: https://arxiv.org/pdf/0901.3583.pdf.



    How can I get the differential equation in "Example 2: Brick on a frictional ramp"? How can I grasp this as a math student?




    $$
    dot{v}(t) = g(sin theta) − nu g(cos theta) text{sign}(v(t))
    $$




    Moreover, do you think there is a physical form of the equation in "Example 3: Non-smooth harmonic oscillator"? (like exp 2.)



    Thank you very much in advance for your answers.










    share|cite|improve this question











    $endgroup$















      0












      0








      0





      $begingroup$


      The following source contains several physical examples: https://arxiv.org/pdf/0901.3583.pdf.



      How can I get the differential equation in "Example 2: Brick on a frictional ramp"? How can I grasp this as a math student?




      $$
      dot{v}(t) = g(sin theta) − nu g(cos theta) text{sign}(v(t))
      $$




      Moreover, do you think there is a physical form of the equation in "Example 3: Non-smooth harmonic oscillator"? (like exp 2.)



      Thank you very much in advance for your answers.










      share|cite|improve this question











      $endgroup$




      The following source contains several physical examples: https://arxiv.org/pdf/0901.3583.pdf.



      How can I get the differential equation in "Example 2: Brick on a frictional ramp"? How can I grasp this as a math student?




      $$
      dot{v}(t) = g(sin theta) − nu g(cos theta) text{sign}(v(t))
      $$




      Moreover, do you think there is a physical form of the equation in "Example 3: Non-smooth harmonic oscillator"? (like exp 2.)



      Thank you very much in advance for your answers.







      real-analysis ordinary-differential-equations dynamical-systems stability-in-odes discontinuous-functions






      share|cite|improve this question















      share|cite|improve this question













      share|cite|improve this question




      share|cite|improve this question








      edited Jan 11 at 13:54









      Namaste

      1




      1










      asked Jan 11 at 13:23









      ODumanODuman

      11




      11






















          0






          active

          oldest

          votes











          Your Answer





          StackExchange.ifUsing("editor", function () {
          return StackExchange.using("mathjaxEditing", function () {
          StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
          StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
          });
          });
          }, "mathjax-editing");

          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "69"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          noCode: true, onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3069822%2fon-the-physical-sample-of-discontinuous-differential-equations%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Mathematics Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          Use MathJax to format equations. MathJax reference.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3069822%2fon-the-physical-sample-of-discontinuous-differential-equations%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          Human spaceflight

          Can not write log (Is /dev/pts mounted?) - openpty in Ubuntu-on-Windows?

          File:DeusFollowingSea.jpg