Recent content by Doc Al

Say what?

Once your work has been published, we can discuss it here. In the meantime, I suggest working through an introductory text on Special Relativity. Feel free to ask any questions in the relativity forum.

Galilean transformations are fine as far as they go. As Einstein (and others) have shown, they must be revised for high speeds. You won't get the correct (experimentally verified) results using them.

FYI: Discussion or promotion of personal theories is not permitted.

I'm not aware of any experimental measurements. But it's a direct consequence of Einstein's energy-mass relationship: ##E = mc^2##

Not sure why you think that. Both mass (and thus weight) will increase with temperature -- but the increase will be quite small. (You can calculate it.)

Why would you think the weight would change but not the mass?

(LaTex fixed)

That's a good note on which to close this thread.

Another useful reference: Hyperphysics: Drift Velocity

When you apply Newton's 2nd law, take all the forces into account.

How many forces act on the car?

You've chosen down the ramp to be the negative direction! What is "F" supposed to be in your equation?

@Mark44 makes a good point. It's a good idea to present your work logically so there can be no doubt about the steps you took. This is especially important if you must hand in your work to be graded! (I knew what you meant, but still.)

Looks good to me!