{"id":23601,"date":"2026-03-13T08:00:31","date_gmt":"2026-03-13T12:00:31","guid":{"rendered":"https:\/\/www.purdue.edu\/freeform\/me274\/?p=23601"},"modified":"2026-03-24T12:10:09","modified_gmt":"2026-03-24T16:10:09","slug":"homework-h4-t-sp26","status":"publish","type":"post","link":"https:\/\/www.purdue.edu\/freeform\/me274\/2026\/03\/13\/homework-h4-t-sp26\/","title":{"rendered":"Homework H4.T – Sp26"},"content":{"rendered":"\n\n\n
Problem statement<\/strong><\/em><\/span><\/a>
\nSolution video<\/strong><\/em><\/span><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

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

\"\"<\/p>\n

Any questions?? Please ask\/answer questions regarding this homework problem through the “Leave a Comment” link above.<\/p>\n

\n

Discussion<\/strong><\/em><\/p>\n

<\/p>\n

You are asked to investigate the dynamics of this system during the short time of impact of P with A.<\/p>\n

    \n
  • It is suggested that you consider a system made up of A+P+bar (make the system “big”).<\/li>\n
  • Draw a free body diagram (FBD) of this system.<\/li>\n
  • For this system, linear momentum is NOT conserved since there are non-zero reaction forces at O.<\/li>\n
  • Furthermore, energy is NOT conserved since there is an impact of P with A during that time.<\/li>\n
  • From your FBD of the system, you see that the moment about the fixed point O is zero. What does this say about the angular momentum of the system about O during impact? (Answer: It is conserved!)<\/li>\n<\/ul>\n

    HINTS:<\/span><\/em><\/p>\n

    STEP 1 – FBD<\/strong><\/em>: Draw a SINGLE<\/em> free body diagram (FBD) of the system of A+P+bar.
    \nSTEP 2 – Kinetics<\/strong><\/em>: \u00a0Consider the discussion above in regard to conservation of angular momentum about point O. Recall how to calculate the angular momentum about a point for a particle.
    \nSTEP 3 – Kinematics<\/strong><\/em>: At Instant 2, the P sticks to A: vP2<\/sub> = vA2<\/sub>.
    \nSTEP 4<\/strong><\/em> – Solve.\u00a0<\/strong><\/em><\/p>\n

    \n

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

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