Velocity Dumb

So the ADiots have noticed my earlier post about them. They seem to be peeved in particular that I have such trouble understanding the wierd autodynamics velocity sum equation. Its not just me thats having problems though, a guy called Will is pointing out that the way they do things is wrong, but to no avail so far, its actually interesting reading how they deal with his well reasoned points, mostly by ignoring them, its like a bunch of five year olds sticking their fingers in their ears and going "I'm not listening to you" check out the first post here. They even accused him of being me, he isn't, I don't use sock puppets, If I wanted to talk to them directly I would.

To those just joining the fun the velocity sum equation is what those of us in the reality based world use to work out how different systems appear from different viewpoints. To illuminate this I'm going to use the example they themselves have provided on their own website (here), I've changed the numbers slightly but the result is unaffected.

Imagine you are a travelling in a slow car along a long straight road, you are moving at 10km/h according to your speedometer. You are overtaken by another car, which from your viewpoint appears to be travelling at 10km/h. The question is how fast does the other driver think they are travelling at? What does their speedometer read?

In classical mechanics the answer is simple you simply sum the velocities of the two cars to work out that the second car is travelling at 20km/h. In special relativity the equations are not so simple but at low velocities (those a bit less than the speed of light) special relativity gives an answer identical to classical mechanics, within any reasonable measurement.

The autodynamics equation for velocity sums is somewhat non standard and in this case gives a velocity of... wait for it... 28.28 km/h (Correction: 14.14km/h, see next post)for the car overtaking you. If the driver looks at his speedometer it reads 28.28 km/h.

Now the point Will, and in fact several others have tried to make to the ADiots is that this is plainly nonsense. We can measure this easily, just get yourselves two cars and a speedcamera in one of them and you can prove this is not the case. It happens every day when police are chasing speeding cars, if the ADiots were right, the police would always be measuring significantly higher velocities for the other car than they were, now some out there may claim that is the case, but I've never heard of a sharp lawyer trying to use this one to get out of a speeding ticket.

So what do the ADiots themselves have to say about this? Well their response are generally along the lines of, "your thinking like a relativist", or that AD conserves energy when relativity doesn't (it does btw), essentially anything to distract from the central point. What good is a theory of motion if it doesn't work in the real world? I'm waiting for the ADiots to explain this one. Feel free to do it here in a comment, I'll post it for all to see.