Why does the Earth attract the apple and the apple at the same time does not attract the Earth (the Earth does not move to the apple)?
How do you know the Earth is not moving up towards the apple?I see an apple falling down :)
That's because you are standing on the earth and are moving along with it. The earth does not move relative to you.I see an apple falling down :)
No, the force is the product of both masses, and they both feel the same force (action and reaction forces equals). Think of F = m a for the apple the for the earth, where F is the same for both. For the earth, m is huge, so the acceleration a must be tiny to keep F constant and equal to the F that the apple feels.Is it because the intensity of gravitational field (g) of Earth is much bigger than the intensity of gravitational field of an apple? I can give you another question - what happens if the Earth radius will expand for example 1 x 10^30 times? Then the Earth will fall on apple! Is it true? :)
You may want to start by reading this FAQI know, but is it observable? Or what is the best way to explain what we observe? I see an apple falling down :)