We began class today with the 22nd week of science news articles (since snow cancelled school yesterday). We discussed section 7-3 & 7-4 notes. I used shoveling snow as an introduction to using a machine to help you do work. I had a student sit on a board and lifted the other end of it, demonstrating the effort force and distance, along with the resistance force and distance. They created work input and output, respectively. I also introduced Mechanical Advantage & Efficiency, and what they mean in practical terms. Students were then assigned page 15-8 # 1&2 only. We reveiwed the answers verbally.
No homework was assigned, and the Chapter 7 test is more than 3 weeks away.
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