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This is a question I asked my parents as a child, when I noticed that the driveway would change colors after pouring water onto it. I really wish my parents had

• jolmg 8y ago
  Lately, because of a car situation, I've been watching car mechanic videos online. There's some old videos, like 1937 old, made by Chevrolet, that explain really well how different mechanics of a car work. One explains a transmission starting from levers[1], how they work to give mechanical advantage, and how gears are basically spinning levers. I ended up feeling like I could make a basic transmission if I only knew how to make metal pieces in the shapes I want. From there I've been looking at people disassembling automatic transmission and explaining the different parts. I gotta say, learning how these machines work mechanical advantage to something so convenient has really raised my interest in physics and mechanical engineering. I don't remember simple machines[2] being something so interesting back in physics class. I don't blame the teacher, 'cause she was always enthusiastic about physics. I wonder why this is more interesting now than then. It's probably just that, now that I'm older, I can understand complex applications of those fundamentals being taught at school. [1] https://www.youtube.com/watch?v=JOLtS4VUcvQ&t=26s https://www.youtube.com/watch?v=JOLtS4VUcvQ&t=26s [2] https://en.wikipedia.org/wiki/Simple_machine https://en.wikipedia.org/wiki/Simple_machine