Non-Concurrent Force Systems

DISCLAIMER & USAGE The content of this presentation is for informational purposes only and is intended for students attending Louisiana Tech University only. The authors of this information do not make any claims as to the validity or accuracy of the information or methods presented. Any procedures demonstrated here are potentially dangerous and could result in damage and injury. Louisiana Tech University, its officers, employees, agents and volunteers, are not liable or responsible for any injuries, illness, damage or losses which may result from your using the materials or ideas, or from your performing the experiments or procedures depicted in this presentation. The Living with the Lab logos should remain attached to each slide, and the work should be attributed to Louisiana Tech University. If you do not agree, then please do not view this content. boosting application-focused learning through student ownership of learning platforms

Find weight of performer and alligator: Class Problem: A circus performer does an act where he and a large alligator balance on a beam. The performer has a mass of 100 kg stands on one end of the beam while the center of mass of the 360 kg alligator is located 3m to the left of the pinned joint at B. The performer pulls on a rope that passes through frictionless pulleys at D and E and is attached to the beam at A. What force must the circus performer pull on the rope in order for it to remain balanced? Note: Because the rope passes through frictionless pulleys, the tension in each rope segment is the same. Find weight of performer and alligator: 𝐹 10m 3m 8m 𝑥 𝑦 3531.6𝑁 𝐹 360𝑘𝑔 100𝑘𝑔 𝑊 𝑝 =100𝑘𝑔∙9.81 𝑚 𝑠 2 =981𝑁 981𝑁 𝐵 𝑥 𝐵 𝑦 𝑊 𝑎 =360𝑘𝑔∙9.81 𝑚 𝑠 2 =3531.6𝑁 𝑀 𝐵 =3531.6𝑁∙3𝑚−981𝑁∙8𝑚+𝐹∙8𝑚−𝐹∙13𝑚=0 + 10594.8𝑁∙𝑚−7848𝑁∙𝑚−5𝑚∙𝐹=0 5𝑚∙𝐹=2746.8𝑁∙𝑚 𝐹=549.36𝑁