From the air track to the particle collider, the Principle of Conservation of Linear Momentum (POCOLM) is one of the most useful tools we have to predict, explain or analyze the outcomes of an exchange of force. I felt compelled to make this particular collision more interesting than other intro-to-POCOLM classics: bodies-on-ice (ooooh) or particles-in-space (aaaah). So here we have two fish colliding in an inviscid lake (one of the lesser prominent locales of Physicsland). Enjoy!
(... drop it like it's hot.) One of the first topics in an introductory physics course is falling bodies and impact speeds. Analyzing the motion of a dropped object turns out to be relatively simple - negecting air resistance, of course. In this video we determine the impact speed of a dropped body using The Big Three (a.k.a. the Kinematic Equations) and some simple algebra.
I was incredibly flattered that so many folks - from so many different places! - enjoyed my lecture video of Kirchoff's Rules that I posted on YouTube for my students at Henry Ford Community College. I was also a bit perplexed. Why did so many folks skip over the higher quality tutorials to watch fuzzy old me scrawling on a whiteboard? The answer, I found, was because high quality videos explaining physics don't really exist... yet.
This blog, and the embedded videos, are my humble attempt to remedy that situation. And get rich and famous. (What? A guy can have delusions of grandeur, can't he?) I hope that my efforts are helpful to many and enjoyable to most.