For now, help with homework Paola means sharpen colored pencils, but I expect soon they will reach the most challenging problems.
You will say that it is premature, but thought I did, and I've come up with the physics lesson.
start with Newton's law.
The principle of inertia, is the triumph of indifference: "Time passes, and who cares, I'm staying here," . total indifference of space, with respect to time.
position, over time, seems not to take anything to do.
The fact that a moving body continues to maintain its motion, the same thing: there is no point of reference for measuring a position ... "I move over to you? What do you mean, are you that you move against me" . We could discuss endlessly.
A good compromise is to accept that everything is relative, and then nothing is really firm, or staying in motion.
In practice, even in constant motion, time is indifferent to space, we have only introduced the relativity to the extent of the position.
Things get complicated if there is a lot of half the rotation . The effort to position profess their indifference to time, and the bodies tend to allontanari from the center of rotation.
A school called: "centrifugal force" . To understand: that the washing machine.
Well, it speaks of strength, because the body tends to move, but what I can see a child, is the body moving, the strength mica.
And if Paola told me that he is "the space which narrows ?"... Cabbage: I have just explained the relative motion ... would be the same, no? The body is actually stationary, but the space narrows, and therefore we it seems that the body away.
Who takes care of you, say it now: "Hey beautiful, not all bodies are moving away in the same way: it depends on the mass!" .
true: the more a body is heavier, seemed in a hurry to get away from the center .
The entry into the field of mass, as told, seems to be related to the rotation.
If we had not turned the tournament, we would not have noticed the mass.
But how do you talk about "mass" , Paul? You are conscious of the weight of objects, that is what effort put into their stubborn desire to fall, to get closer to the center of the Earth.
distinguish between inertial and gravitational mass, appears to be a fastidious qualms, in fact, their contemporary, is the source of that wonderful balance ( "I walk away? I go? ... I do?" ) that keeps the planets around the sun (I read that around the Earth there is a space glove, lost in a mission "Gemini" , which suffers from the same indecision).
Albertone told us that gravitation is not a "effect at a distance" , but a distortion of space-time ... I know, maybe the rotations deform the space in a symmetrical manner.
Can you imagine something in space that revolves around something else? ... In particular, around something "heavy" ?
If you're thinking, I do not think a long time, because it is already falling at breakneck speed.
I had this idea: the central mass, seems to expand the space around him, so it seems to us that the bodies want to "fall"; and the mass of the body that rotates around, it seems compress the space around him. The balance between this expansion and contraction results in the fact that the Moon seems to stop, when it rotates around the earth, but instead is the space that slides under the .
In other words, it is as if the central body "cede" space that rotates around the body.
And this flow is time.
not?
Look, maybe it's better than the physics, Paola, we explain it to him to someone else, and I sharpened colored pencils, do you agree?
. Spread the word. 
