I know this is an incredibly simple question, but I am trying to find a very sim
ID: 1392555 • Letter: I
Question
I know this is an incredibly simple question, but I am trying to find a very simple explanation to this other than the simple logic that energy is conserved when two items impact and bounce off each other.
The question is this: how do particles, atoms, objects just carry on moving in space in their free will (in a "vacuum")? When I am throwing a ball and let go of it (imagining that myself and the ball are in a vacuum of which I am impervious) why does it keep pushing itself forward? I know there's a logic to it that says "what's there to stop it" but really, what is keeping it going, infinitely through a real vacuum?
So there's kinetic energy which is being used, and potential energy inside it. Is the kinetic energy flaring out the back of it like a ball shaped rocket? Is it really just the simple logic that "nothing is there to stop it"? Or could there be other methods such as propagation? With dark energy?
I know all the Newtonian stuff just to be straight, and I know about friction etc etc and the maths behind those. It's just the acceptance that things just carry on moving that I'm finding difficult.
just realised, okay, energy is not being used. So why is it just cruising?
I can't vote up yet by the way, else I would on all these great answers! Thanks everyone.
Explanation / Answer
In this above question,
energy is not being used, it is just crushing because acceleration due to gravity is a consequence of force. In absence of any force, there cannot be an acceleration (or retardation). it means that the velocity remains constant.
energy is conserved when two items impact and bounce off each other. According to conservation of energy, kinetic energy is being used and also a potential energy inside vaccum. symmetry implies that there is a conserved quantity.
Anything in motion has this kinetic energy ( which actually known as 'potential inertial energy') because it has momentum and it is only converted into different types of energy when its in interaction with something else, like a collision with mass or the gravitational field of another mass or electromagnetic fields.
Energy is inversely proportional to stability. If something has more energy than required energy, then it will have less stability than required. this lack of stability can be seen in the form of its motion.