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The Daniel Bernoulli Project.Unit Organizer Initial Concepts: Drag, Lift, Thrust, and Gravity. The students will need to understand air has mass. This is not intuitive, and may require repeated and detailed explanation. Bernoulli's Principle teaches pressure varies with velocity: it is the velocity which creates a pressure differential over and under the wing. There is also the misperception of suction as some sort of force: suction is negative pressure. The balloon experiment is counter-intuitive as well: the correct way to get the balloons together is to blow between them. The bubble experiment is messy. To get the bubbles to rise most effectively, swish the card OVER the bubble. The paper airplane experiment should be taken stepwise. Make sure all the planes get built first, then do some flight trials, then organize the competition. Otherwise, they all straggle in at various times. And don't let them decorate the planes too much, they'll ruin the planes. There are several good books on this, I really wish schools wouldn't be so hard on boys flying paper airplanes in school, it's wonderful physics. I have glommed some material for this plan from ASKEric. You should, too. It's a wonderful resource. |
