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ME 221 Statics Lecture #17 Section 4.6 ME 221 Lecture 17 1 Homework #6 • Chapter 4 problems: – 10, 11, 18, 24, 39, 42, 43 & 47 – Must use integration methods to solve – Due Monday, October 14 ME 221 Lecture 17 2 Homework #7 • Chapter 4 problems: – 52, 53 & 54 – Due Friday, October 18 ME 221 Lecture 17 3 Quiz #4 • Today Exam #2 • Friday, October 18 • Last day to drop without a grade reported is: Tuesday, October 15 ME 221 Lecture 17 4 No Class • Friday, October 11 • Use this time to work on homework ME 221 Lecture 17 5 Last Lecture • Centroids of composite sections QUESTIONS ????? Today • Section 4.6 - Distributed Loads ME 221 Lecture 17 6 Distributed Loads • Distributed loads on beams – Application of equivalent load • Example ME 221 Lecture 17 7 Beams Beams can be loaded by a point load or a distributed load P x w(x) Replace the distributed load with an equivalent concentrated force. dx L The equivalent force is the sum of all the forces. ME 221 W Lecture 17 L 0 w x dx 8 Equivalent Load Location The equivalent load is placed at the centroid of the distributed load. w(x) 1 xc W L 0 x w x dx W To find reaction loads: replace distributed load with equivalent load at centroid ME 221 xc L Lecture 17 9 Example ME 221 Lecture 17 10 Quiz #4 ME 221 Lecture 17 11