i think its because you stare at the screen for to long then your eyes get used to that sight and all of a sudden they change seenery just like if you were out in the sun blazing then you come inside and its all dark and your eyes start to hurt its the same consept
A belt is on the outisde and keeps everything together, where as a gear is on the inside and keeps moving.
A body moving in a circular path has no fixed direction. Its direction keeps on changing with every step of its motion.
inertia keeps moving it!:)
The pumping of the heart keeps the blood moving
The rotation of the earth keeps a foucault pendulum moving
Because the moon keeps moving and it has a gravitatinonal pull
The nucleus is the thing that keeps us moving because, oh just go to biology4kids.com
There are TWO forces that keeps objects in orbit; gravity and inertia. Everything is in motion. The force of inertia, the momentum that an object has BECAUSE it is moving, KEEPS the object moving - at a constant speed and in the same direction. But if inertia alone ruled, all of the planets would fly out away from the Sun. Another force must tie things together, and that is gravity. Gravity ties every mass to every other mass, pulling them together with a force that is proportional to their masses - but which decreases proportionally to the SQUARE of the distance between them.
gravity keeps us in a circle
Everything floats because of the low gravity. Gravity keeps you on the ground; without it, you are floating free!
Inertia
The Trader Keeps Moving - 1924 was released on: USA: 20 April 1924