I'm not an expert on special relativity; all I know is that some really weird sh*t would happen. Also, what happens would depend on where the observer is - for example, if you were to be somehow riding the fist on its way to the opponent's face, things would look pretty normal (I think)...
Hilarious.
I'll try to clarify a little; what I think you mean is what happens to the fist at relativistic speeds (not necessarily the speed of light, c). According to Wikipedia, anything above 0.1c is relativistic, so any fist flying at > 0.1c would require special relativity in order to...
Yeah, best stick to point particles; I still need to think about the center of gravity concept, and how it relates to what I'm trying to get across.
I'm also getting confused with respect to the motion of the two particles. In my mental experiment, I'm considering two particles which are not...
And, also, I should have said that I'm not thinking about this in strict classical terms, but in more of a "geodesic/geometric" kind of a way.
For example, take the Sun. if there were no planets around and it was just the Sun sitting there, its mass would still distort space-time; there would...
Okay, for example let's say m1=19.5 and m2=0.5. Total mass of the system is 20. The force is 9.75(G)/r2
Now, instead of 19.5/0.5, let's say 10/10. Mass of the total system is still 20. But the force is now 100(G)/r2
Maybe my problem is that it doesn't really make sense to talk about...
1. Take the equation F=[G(m1)(m2)]/r2
2. Assume a single mass of 20 (units don't matter), which will be divided in the following ways:
2.1. System 1: m1=20, m2=0
2.2. System 2: m1=19, m2=1
2.3. System 3: m1=18, m2=2
2.4. System 4: m1=17, m2=3
.
.
.
2.11.System 11: m1=10, m2=10
Now...
3...