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Crazy Eights — Days 1 and 2 Lesson: Axial Stress Force v. Elongation Stress v. Strain Lesson: Sample Problem Activity: Make First Beam Classwork: Problem 1 Homework: Problem 2

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Crazy Eights — Days 3 and 4 Turn in Problem 2, Do problem 3 Homework: problem 4 Lesson: Area, Moment. What do you do if you can’t loosen the nut to change a tire? Activity: Test First Beam Lesson: Centroid, Y max Activity: Make Second Beam

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Crazy Eights — Days 5 and 6 Turn in Problem 4 Start problem 5 (make table of results) Homework: Finish problem 5 Lesson: I, Z Why does the figure skater spin faster when she pulls her arms in? Activity: Test Second Beam Activity: Make Third Beam

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Crazy Eights — Days 7 and 8 Turn in Problem 5 Lesson: Elastic Flexure Formula Sample problem like number 6 Activity: Test Third Beam Lesson: I, Z for asymmetrical beams Why work when you don’t have to? Activity: Make 4 th beam if desired Start your report. Homework: Problems 6, 7, 8

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Crazy Eights — Wrap-UP Turn in all homework problems Activity: Test Last Beam Lesson: Finish and Submit Report Analysis, Synthesis, Charts, Graphs Plot 8 good beams F v. A, y max, h, I, Z, etc. Pick a conclusion and defend it! Theorems and Terms Axial: F, A, e= l- l 0, σ=F/A, ε=e/ l 0, E=σ/ε Bending: M=(F/2)(8"/2), I=bh 3 /12, Z= I/ y max, σ = M/Z

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Example: Figure Skater A figure skater with a mass of 50kg spins at 308 RPM when her arms and legs are tight to her body. What is her angular.

Example: Figure Skater A figure skater with a mass of 50kg spins at 308 RPM when her arms and legs are tight to her body. What is her angular.

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