# vpython

# Dot Physics

# Tag archives for **vpython**

I am not a programmer. Just to be clear. I use python to get things done, but I am sure it could be done in more efficient ways. Anyway, I sure you know how much I like vpython – especially for teaching physics. However, sometimes I use it for blogging stuff also. The problem is…

In part I of this post, I talked about the basics of projectile motion with no air resistance. Also in that post, I showed that (without air resistance) the angle to throw a ball for maximum range is 45 degrees. When throwing a football, there is some air resistance this means that 45 degree is…

VPython 5.0 is mostly out (in release candidate). To tell you the truth, I have been holding off on some vpython programs because I wanted to do them in the NEW vpython, not the OLD vpython. So, if you want to get the new vpython, go to http://vpython.org/index5.html. What is so great about VPython 5.0?…

Numerical calculations are grand. Of course, they are just another form of normal calculations – like I have said before. So, I have mostly used [VPython](http://vpython.org) for my calculations on my posts. But there is a new game in town: [Easy Java Simulations](http://www.um.es/fem/Ejs/). What is the difference between these two? Which is better for students?…

Maybe you know I like numerical calculations, well I do. I think they are swell. [VPython](http://vpython.org) is my tool of choice. In the post [Basics: Numerical Calculations](http://scienceblogs.com/dotphysics/2008/10/basics-numerical-calculations.php) I used vpython and excel to do something simple. I will do that again today (in that this problem could also be solved analytically). However, there is one…

**Pre Reqs:** [Kinematics](http://scienceblogs.com/dotphysics/2008/09/basics-kinematics.php), [Momentum Principle](http://scienceblogs.com/dotphysics/2008/10/basics-forces-and-the-momentum-principle.php) What are “numerical calculations”? Why are they in the “basics”? I will give you really brief answer and then a more detailed answer. Numerical calculations (also called many other things – like computational physics) takes a problem and breaks into a WHOLE bunch of smaller easier problems. This is great…

In my classes, I like to bring up the question: *Why do astronauts float around in space?* The most common response to this question is that they float around because there is no gravity in space. Some people take this a small step further and say that there is no gravity in space because there…

There is no air resistance in line rider. Sorry to spoil the suspense. To test for the presence of an air resistance force, a track was created that let the rider fall. ![linerider air 1](http://scienceblogs.com/dotphysics/wp-content/uploads/2008/09/linerider-air-1.jpg) (note the markers on the side. These are used to keep track of how the origin is moving). Below is…