Today we testing the Physic's students toothpick bridges. They had 30 toothpicks and had to span a 15 cm distance. We don't have a real set of weights, so we had to improvise. We started with a plastic container with salt, adding 100 grams additional salt each round.
When that container was full we took a plastic beaker and started adding D batteries, each has a mass of about 140 g. We go to 1,200 grams with 2 surviving bridges by the end of class. As a class we agreed that one had a better design and should be the winner.
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