Originally posted by Marchegiano
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Energy, Force and Power are so interrelated that really we could use anyone of them for our purposes with a little algebra. They all come together, can't have one without the other.
I would love to have a thread about the kinetic chain, especially since I don't know much about it. Go ahead, sir, by all means start such a thread. I consider you and Bill the masters of that around here. There may be others, my apologies to them.
The only other thing I wanted to mention is that the car experiment could be done entirely differently. No brick wall this time. They cross the finish line at exactly the same instant at 100 mph, one has been accelerating in order to catch up at the last instant, the other has maintained a steady speed on the few feet. Does one car take longer to stop if power is cut exactly at the finish line? Does it take more energy to stop it?
I would like to say they are the same, but I have learned intuition can really lead one astray in math. Some gamblers at dice came to Galileo. They did not understand why their own calculations (which they considered logical) were so amiss that they differed from the reality of their experience. Galileo had to explain to them that there are two ways to roll a 7 with a 6 and 1 because the order of the dice could be different. Imagine dice of two different colors. You could roll a 6 with the red die and 1 with the blue. Or it could happen the other way around. The gamblers had not reasoned that part out. They thought there was only one way.
Was Galileo a genius? That was small potatoes for him. That son a of gun figured out the principles of gravity by rolling cannonballs down a ramp. If it gets smarter than that I don't know about it. Like Ali, he was forced out of his occupation in his scientific prime. He would have given us a hella lot more if left alone.
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