Caporegime
2 is the same number as 2.
Why does the earth spin?
- Thread starter Morba
- Start date
2 is the same number as 2.
A lot of physics depends on perspective, something I find interesting is:
A person on a train moving at high speed is bouncing a basket ball, straight up and straight down between their hand and the floor of the caridge. You can test this and measure it. You can even video it as proof that the ball is bouncing straight up and straight down.
Now imagine the same scenario, except you are not observing this from within the train, you are stood on a platform watching the train pass by at high speed. Now the ball is not bouncing up and down at all, it's bounding forward at an incredible speed, clearing 100 foot gaps between bounces.
Who is right? The guy on the train, looking at a simple ball being bounced up and down, or the guy on the platform, who sees the same ball bouncing along clearing massive distances between bounces?
A person on a train moving at high speed is bouncing a basket ball, straight up and straight down between their hand and the floor of the caridge. You can test this and measure it. You can even video it as proof that the ball is bouncing straight up and straight down.
Now imagine the same scenario, except you are not observing this from within the train, you are stood on a platform watching the train pass by at high speed. Now the ball is not bouncing up and down at all, it's bounding forward at an incredible speed, clearing 100 foot gaps between bounces.
Who is right? The guy on the train, looking at a simple ball being bounced up and down, or the guy on the platform, who sees the same ball bouncing along clearing massive distances between bounces?
Aaaarrrgh Nooooooo!
how could i be so silly!
<edit>
that said, you could argue that there are four digits/numbers, thought only three unique numbers
Sure is
Though 0 was not a number that the Romans recognised, so we could say there is only 2 numbers!
Soldato
- Joined
- 7 Feb 2004
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Tell your child that you don't know but if it ever stops he will fly into space and his blood will boil in secounds. That should help him sleep at night 
Associate
No scientist by any means, but doesnt this have something to do with the frame rate our eyes capture images? Like seeing a wheel on a fast moving car spin backwards, its not obviously we just cant see it 'fast' enough.
Nope, its to do with where you observe it from. Assuming the train was made from transparent glass, you could observe both from the train and from the platform, one observation would see a ball bouncing up and down, the other would see a ball bouncing great distances, perhaps even looking like the ball is suspended in mid air, if the train is moving fast enough relative to the person watching it.
What about those that walk up or down?!
They don't exist, but birds do fly up and down when they migrate which causes the earth to lean a bit up and a bit down every year. Season change is actually the effect of their migration, not the cause.
True fact 2.
Caporegime
Why do birds suddenly appear?
That's excellent! Lol
Soldato
Yes but what if the planes were on a treadmill, and then...
Soldato
[FnG]magnolia;18213949 said:
Why do stars fall down from the sky?
I have a question for all the physicists/theorists out there:
- If someone made the Earth rotate the wrong way round, and made the planets and moons orbit the wrong way round, and made everything else go backwards, would we go back in time?
I always wondered this when I watched that old Superman movie.
I would imagine that if the earth and the moon did spin the other way around the world as we know it would be quite different as I expect that it would affect the weather systems and so would have a massive effect on land erosion, meaning that our continents would look very different, resulting in completely different countries, languages and development of the modern world.
Or maybe the world would be the same but all the continents would be the opposite way around.