Day 43: Great conversations

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Today we whiteboarded the balanced forces WS 1. The problem above spurred a conversation about how we know the forces balance (they must, since the velocity is constant, right?), at which point I prompted the group to draw the dotted lines (A new term, components!), label them, and then use them to write an equation. I found this a thrilling way to hint at Newton’s 2nd law (and to represent Newton’s first). Additionally, both classes got into a great discussion about a block being pulled across a table with friction and whether tension should be bigger than friction, both with CV and not CV. 7th hour didn’t resolve it when the bell rang, we’ll be coming back to that tomorrow!

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