ME 221 Statics
Exam #1 Review
ME 221
Exam 1 Review
1
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 221
Exam 1 Review
2
Exam 1
• Wednesday, September 17
ME 221
Exam 1 Review
3
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 221
Exam 1 Review
4
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 221
Exam 1 Review
5
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 221
Exam 1 Review
6
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 221
Exam 1 Review
7
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
ME 221
Exam 1 Review
8
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