Day 52: Newton’s 3rd Law DemosPosted: November 14, 2013
Today I led the classes in a series of Newton’s 3rd Law demonstrations. We learned the above demonstration from Eric Gettrust, our Modeling Instruction leader, which he published in The Physics Teacher. The purpose of this demo is to model the interaction between a person and the Earth, showing that the attraction force itself is equal though there is a greater effect on the smaller object. Close up below.
I also do car crashes (picture below), tug of war with two force detectors, and the class favorite, chest bumps with force plates.