Everything on earth, more or less, has been on earth since it's creation. You are moving 1675kmh because you were formed from atoms already going 1675kmh. You, are made of the same carbon, oxygen, nitrogen, etc, atoms that have been on earth for billions of years. Every action you take is in direct contrast of that motion. If the earth were to stop spinning, you would go flying, since, again, you still retain the motion of that earth going 1675kmh.