Day 9: Rules for the Direction of the Unbalanced Force

The set of problems today asked students to draw multiple representations based on given velocity-time graphs, but also to say whether the forces were balanced, unbalanced in the positive direction, or unbalanced in the negative direction. After the first problem, one student volunteered a rule (I didn’t prompt this!)—that the unbalanced forces were correlated with the acceleration. That 0 acceleration means balanced forces, positive acceleration means positive unbalanced forces, … Continue reading Day 9: Rules for the Direction of the Unbalanced Force

“This seems pretty weird, but I think it’s right.”

Thanks to the PUM materials that I’m using in my trimester 10th grade E&M class this year, I’m asking my students to do more practice with stating an idea, then designing an experiment to test that idea, then saying what their idea predicts they will see during that experiment that they designed. These are really hefty skills, and they have not come very easily to … Continue reading “This seems pretty weird, but I think it’s right.”

The New Year

Hello, Internet! As the new school year rapidly approaches its beginning, I am attempting to revive this blog (even though it fell apart in the middle of the year last time around).  With the revival, I am also rethinking my approach to the 180 flavor of blogging. Instead of a photo-heavy daily log (which, let’s admit, is sort of a 180 shades of whiteboarding in … Continue reading The New Year