$50M for correct answer!

Sounds like a paradox kind of thing

You get a paradox.

Well the whole scenario depends on the shape of the objects and their surroundings. One scenario suggest that they are both triangular, with tips facing each other. When they meet, the unstoppable ones point slips off to the side, and it moves in a different direction. Just because it is unstoppable, does not mean it cannot be influenced by its surroundings. (Think of tectonic plates that first crash together, then slide to the side of the other and continue moving.)

Does a ring-shaped object count as penetrable? Cuz if not I'm just gonna go for that :p

The laws of physics would require both to have an infinite amount of mass and energy, but would not allow their velocities to change, so in theory they would simply just pass right through each other.

https://www.youtube.com/watch?v=U9G18qHPhcM

Inertia

The impenetrable object will just deflect the unstoppable object. That way the unstoppable object remains moving without being stopped and the impenetrable object is intact in its place.

not enough variables removed from the question to answer.

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Assuming you are speaking of physics and both objects have an infinite mass and energy then basically nothing would happen.

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If you are speaking in terms not associated with physics, and the to objects are merely representative of something else then I suppose it could be anything. A faction war?

My guess is : "An accident"

Unstoppable Impenetrable Object ---> Moving Vehicle

Immovable Impenetrable Object ---> eg A lamp Post

ACCIDENT *ouch*

You will get CHUCK NORRIS!!

I think he riddle stated "cross" of the two objects. So, deflection ain't supposed to be an option I guess.

i quote myself^^ forgot to add my last words :

This is an example of Russell's paradox^^

Unstoppable forces and immovable objects are imaginary, so it is impossible to answer the question.

impenetrable object

I think they turn into pure energy with the output equal to e=mc^2. Nothing remains, just pure energy output

an irresistable urge to penetrate the immovable and never stop !!

A lot of people here saw the MinutePhysics video on the subject, it seems. Many answers almost ripped word for word. That video says the two objects will pass through each other, and that the two items are actually the same thing. It also states that those objects cannot exist, by definition. But you specified that they're impenetrable as well, implying that the suggest "objects" are solid.



The question a lot of people seem to be missing is that you're asking what you "get", not what happens. so they're almost answering the wrong question.



Now, for my guess:



If its a trick question: This is about JFK vs SA. Unstoppable: SA is an incredible force, training for this moment for ages. Immovable? JFK has sat comfortably on the throne for years now. They laugh when someone comes for it. So what do you get? You get rank 1 baby. I mean, SA doesn't, but that's besides the point :^)



If it's not symbolic and you mean literal objects, then who knows. That's speculation, as those objects cannot exist with our current laws of the universe. So you're only saying that you're looking for the answer that lines up with yours, which I don't think is really all that fair. I refuse to guess if this is the case.



Thanks for the fun thread.

you worded it much better than I did. lol

[image: img.pandawhale.com]


Object A properties : unstoppable , impenetrable.
Object B properties : immovable, impenetrable.

Problem : Cross A with B result ?

Answer :
if both objects are penetrable then they will pass through each other with no effect on each other at all
Explanation can be found on this video Immovable Object vs. Unstoppable Force - Which Wins? by minutephysics

But
Since A & B are impenetrable which mean they can't pass through each other .
Since A is unstoppable which mean it have infinite mass.
Since B is immovable which also mean it have infinite mass.
Then Both A & B are black holes.
Then Crossing both Objects will form a new object as bigger black hole which can be called Object C.