Quiz - Gave students a multi-system body and asked them describe interactions between various subsystems and to draw an FBD for one of the subsystems.
q-n-a:
1. checked their OLI-Notebook - some students went way too far in depth, others not enough - used Goldilocks parable to try and get everyone in right direction ( I am looking for ~ 1 page of highlights plus questions per module)
2. discussed sense vs. direction and discussed springs gave examples of each
3. put module 2 quiz on screen and answered questions
Quiz - had students draw fbd for subsystem from quiz (they all neglected interaction between pulleys and whatever is supporting them)
Middle hour:
Local entrepreneur presented on wind turbines and an idea to build towers out of 6 foot members in an octahedral shape that would not require a crane to assemble. We listed all of the design constraints and design objectives then decided we need to be able to analyze forces at many different points on tower. (we need some tools to do this)
Last hour:
3-D equilibrium of a point was discussed and an example done in class. Made connections to 2D equilibrium and to our needed knowledge for the tower project.
Used ppt presentation made by Anna and Paul for module 3. Used clickers. This went well. Had two places where students evenly split. Then went to group discussion before voting again. I feel like this is very useful and appropriate as a setup for module 3.
Homework:
OLI Module 3 - Record muddiest point in my response
3D equilibrium problem handout of a radio tower - find force in the three guy wires.
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