J.C.MacSwell

You seem to be neglecting gravity when you choose your smallest angle

Wouldn't that rule out time also? It isn't orthogonal to the first three. (although it is often pictured that way)

I think you just answered your question. 3.5m/s is the maximum acceleration for the lower block. Any slippage and it is reduced. 3.5m/s is the minimum acceleration for the upper block. Any slippage and it is increased.

In this example it works but if you vary your speed in a circular motion the force and acceleration vector would not be directed exactly radially. I agree with everything else for the special case, circular motion at constant speed.

In fact if the speed changes then the force of the acceleration vector will not be exactly radial or perpendicular to the instantaneous velocity vector.

Just a thought on this: Prior to failure they "flow" into a reduced effective contact area which then "fails" or breaks off. This gives it momentum as well as weight over the reduced area. The initial "pinching off" close to the surface is a "flow" toward a somewhat stronger bond from a somewhat weaker as opposed to a failure.

Pyramid Energy does exist. If you happen to be walking by one and a chunk of it comes loose and starts hurtling toward you, do not make the mistake of believing it doesn't.

It's spelled "sick":D

Seems like confusion reigns in the biggest extrapolation imaginable. Not really surprising but kudos to anyone who can take a genuine semi scientific (it can never be tested directly) attempt at it. Agree with Ecoli on this one.

Thought this was interesting though not technical. The latter part discusses humans with chimps. http://www.cbc.ca/news/viewpoint/vp_strauss/20060606.html "Which brings me to the humanzees. What would we do if one of them happened to come into being now? There have been attempts to create them, including astounding research in the 1920s in which Soviet biologist Ilya Ivanovich Ivanov first tried to impregnate chimpanzees with human sperm. He then artificially implanted orangutan sperm into women volunteers. His cross-breeding didn't produce any hybrids, but what if?" It's probably good that it wasn't sucessful as the moral issues would be staggering.

Off topic but they are using them again.

I think this is correct. The net force on each is 3.5 N and they accelerate at 3.5 m/s^2.

If it is not overcome, how do they move? Note that the normal force between the two blocks is only half that of the force between the bottom block and the surface. edit: oops missed the frictionless surface part I think you are correct and the net force on the bottom block will be 3.5 N

Like this, which will reach you before I type it, except now I think I might not type it after all.

I think you can, at least temporarily, it's only another 14.7 psi. Eventually you will get tired though, same as on Earth except sooner.

Exactly at the bottom if you will "land" after infinite drop and exactly at 45 if you have to "land" at that height. (the 45 degree height) So not enough info.

I'm game! I have a half baked steady state theory somewhat along these lines that is not fit for print but I'm interested.

Certain or not quantum theory has every particle of it having some probability of it being in your head (and every particle of your head having some probability of it being where your monitor is) except when you are measuring and confirming that that is not the case. So keep a close eye on it!

If you flipped a coin once every minute, how long would it take, on average, to get 100 heads in a row? (some huge number) Now how long would it take, on average, to get one hundred heads in a row if you were allowed to ignore all "tails" results and continue counting heads? (199.5 minutes I think)

The above seems like common sense. But it's a quantum effect. Are you sure it's correct? I thought that a measurement of one forced the other to eliminate some of it's "options", not just reveal something hidden about each.

Thanks Martin that was fun.

So prior to Maxwell the Universe didn't behave this way?