Author: Michael Kemp
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Force That Takes No Energy
There are forces that we see every day that take no energy. How can you have a force that takes no energy? It all began with me musing as to how a magnet sticks to my refrigerator. A conversation with some physics folks on Discord helped me sort out my thoughts. I realized that most…
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Which Way Down?
OK. This is going to sound crazy, but the direction of down where you are is not the same as the direction of down where I am. Why? Because everything on Earth gets pulled towards the center of the Earth. And yes Martha, the Earth is round. If where you stand on Earth is different…
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Dropping Hammers, Feathers, and Balls – Oh My!
How does gravity actually act? Back in ancient Greece, Aristotle said that the speed of a falling object depends on how heavy it is. Twice as heavy? It’s going to fall twice as fast. Well, that’s just common sense. A hammer falls faster than a feather. Aristotle also said that when you drop an object…