Take a scale on an elevator, and you will notice a reading higher than your weight when the elevator is accelerating upward and lower when accelerating down. A scale measures what we call the normal force, and for the usual zero acceleration case on a level surface, the normal force is equal to the weight. Also some info on when a quantity undergoes exponential decay or exponential increase. Here are some problem tests on applications of the principles. Anyway, here it is.
Planet Earth is too thin by a factor of billions .
Other mind boggling things about nature are found in special relativity and general relativity , in which the essence is explained with a little algebra. Much of technology involves managing the flow of these things, so this is a big deal. It includes non-flow cases as well. That is a big deal, too. Simple harmonic motion, sound, light, .