{"id":23443,"date":"2026-02-09T08:01:30","date_gmt":"2026-02-09T13:01:30","guid":{"rendered":"https:\/\/www.purdue.edu\/freeform\/me274\/?p=23443"},"modified":"2026-02-17T08:37:04","modified_gmt":"2026-02-17T13:37:04","slug":"homework-h3-c-sp-26","status":"publish","type":"post","link":"https:\/\/www.purdue.edu\/freeform\/me274\/2026\/02\/09\/homework-h3-c-sp-26\/","title":{"rendered":"Homework H3.C – Sp 26"},"content":{"rendered":"\n\n\n
Problem statement<\/strong><\/em><\/span><\/a>
\nSolution video<\/a>
\n<\/strong><\/em><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

DISCUSSION THREAD<\/span><\/strong><\/em><\/p>\n

\"\"
\nAny questions??<\/p>\n

\n

Discussion and hints:<\/strong><\/em><\/p>\n

Let’s first take a look at the motion of point B. This motion of B is shown in the simulation results below.<\/p>\n

<\/p>\n

The motion of B is circular, with the center of the path located at point D. This is expected since link BD is pinned to ground at point D.<\/p>\n

Now, let’s attach an observer to link AC. Keep in mind that this observer is unaware that they are moving. The motion of B that this observer sees is straight, with this straight path aligned with the collar sliding on link AC. Since the xy<\/em>-axes are attached to AC, this relative motion is in the x<\/em>-direction:<\/p>\n

(v<\/strong>B\/A<\/sub>)rel<\/sub>\u00a0= vrel<\/sub> i\u00a0<\/strong>= d_dot\u00a0i<\/strong><\/em><\/p>\n

(a<\/strong>B\/A<\/sub>)rel<\/sub>\u00a0= arel<\/sub> i <\/strong>= d_ddot\u00a0i<\/strong><\/em><\/p>\n

where d_dot<\/em> and d_ddot<\/em> are unknowns (you will solve for these in your analysis). You can see this is the following animation shown from the perspective of the observer attached to link AC.<\/p>\n

 <\/p>\n

<\/p>\n

\n

 <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Problem statement Solution video DISCUSSION THREAD<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-23443","post","type-post","status-publish","format-standard","hentry","category-chapter-3-homework"],"_links":{"self":[{"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/posts\/23443","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/comments?post=23443"}],"version-history":[{"count":2,"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/posts\/23443\/revisions"}],"predecessor-version":[{"id":24017,"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/posts\/23443\/revisions\/24017"}],"wp:attachment":[{"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/media?parent=23443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/categories?post=23443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.purdue.edu\/freeform\/me274\/wp-json\/wp\/v2\/tags?post=23443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}