[PDF] I n t r o d u c t i o n à l i n f o r m a t i q u e

What makes an an object move?

What force makes an object move? There are different forces that make objects move :-wind, water, gravity, magnetism. Unbalanced forces cause objects to move • Inertia is the tendency of an object to remain at rest, or to keep moving in the same direction unless an outside force acts on it.

How do you know if an object has moved?

If you'd like to know if an object is moving relative to you, well then that's quite simple. One way is to look at its parallax, i.e. is its position changing relative to some very distant objects (stars or quasars or something like that).

Can an object move relative to itself?

Objects do not move on their own. If they are in motion they were initially moved by a force, either from their initial development as an object or by an outside force that initially moved them to motion. Yet, the atoms and smaller particles of objects are always in motion.