Day 53: N3

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Today we addressed Newton’s third law through interaction diagrams and demonstrations.  This is my favorite; set the sample rate on a couple of force detectors at the max 100 samples/sec,  add rubber stoppers and a bit of kleenex on the end to lengthen the time of the interaction,  and let er rip.  “Well,  the forces are the same when the carts are equal mass but they won’t be when the masses are different.”  Test it.  What about one moving one at rest? Test it. One against the wall?  Test it.  Tons of fun.

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