ME 221Exam 1 Review1 ME 221 Statics Exam #1 Review

ME 221Exam 1 Review2 Homework Due today: –Chapter 2 problems: –61, 64, 70, 71, 72, 82, 86, 94, 105 & 113 Grades posted in Angel –HW #1 & Quiz #1 (and solutions) –HW #2 & Quiz #2 (solutions posted) –HW #3 solutions to be posted late today

ME 221Exam 1 Review3 Exam 1 Wednesday, September 17

ME 221Exam 1 Review4 Exam Format Similar to homework problems 5 or 6 (maybe 7) problems No new concepts Closed books and closed notes 15% of final grade Will need a calculator Back rows must sit every other seat

ME 221Exam 1 Review5 Exam 1 Helpful Hints Study by working homework problems Review the examples in the book Read the exam questions carefully Work the problems you know first Use a logical flow to show your knowledge Be complete

ME 221Exam 1 Review6 Exam 1 Pitfalls Vectors have both magnitude and direction Most answers will have units Calculated answers should be in decimal form Use 3 significant figures where appropriate Answers are generally worth ~1/3 of points Steps leading to answers are worth ~2/3

ME 221Exam 1 Review7 Exam 1 Topics All of Chapters 1 & 2 except 2.11 Springs Newton’s Laws Units Scalars & vectors; defining, adding, etc. Laws of sine and cosine Resolution of a vector into components

ME 221Exam 1 Review8 Exam 1 Topics 3D coordinates & unit base vectors Directional cosines Nonorthogonal vector components Scalar products of vectors 2D & 3D equilibrium problems Drawing a good free-body diagram

Exam 1 Exams will be graded Wednesday night Scores will be posted on Angel late Wednesday or early Thursday Last day to drop with full refund is Thursday

Exam 1 Historical Data Of those students below 60 points on exam 1: ~30% dropped the course ~24% received 0.0 for final grade ~46% passed the course None has finished above a 2.5 final grade