Posts Tagged ‘vectors’
It’s odd, I have used centripetal acceleration quite often, but I never derived the expression that I use. To get to the point, the magnitude of the acceleration of an object moving in a circle is:
Pre reqs: Free Body Diagrams, Force, Kinematics
The time has come to look at things that are NOT in equilibrium. The most basic question to ask yourself is: “What do forces do to an object”? Aristotle would say that forces make things move. Constant forces make things move constantly. Actually, Aristotle said [...]
Pre Reqs: Intro to Forces, Vectors
Hopefully now you have an idea of what a force is and what it isn’t. What do you do with them? The useful thing to do with forces is to determine the total force acting on an object. At the beginning of the introductory physics course, you [...]
pre reqs: Vectors and Vector Addition
This was sent in as a request. I try to please, so here it is. The topic is something that comes up in introductory physics – although I am not sure why. There are many more important things to worry about. Let me start with an [...]
pre-reqs: trig
Think of the following two things. Temperature and wind speed. These are two different things that you could measure, but there is one big difference. Wind speed has two parts to it – how fast and which direction. Temperature is just one thing (no direction). Temperature is an example of [...]
I know the olympics are basically over. Really, I should have posted this earlier. Anyway, the gymnastics feat that always impresses me is the Iron Cross (I think that is what it is called). I know you have seen this, but here is a picture from wikipedia:
(http://en.wikipedia.org/wiki/Rings_(gymnastics))
Why is this so impressive? [...]