There is no such thing as an unstoppable force, or an immovable object. Things like nuclear explosions or planets come close, but not close enough.
AnswerThis is known as the 'Irresistible Force Paradox'.
An irresistible force would have to possess (effectively) infinite energy, which is impossible for a finite universe. Also, for a universe in which irresistible forces are possible, immovable objects would not be (therein lies the crux of the paradox). For the sake of the question, we would also have to assume that both are indestructible, subverting the obvious answer that both would be destroyed.
This is related to the 'Omniscience Paradox' - the question "can God create a stone that is too heavy for even Him to lift?"
If an irresistible force meets an immovable object, the immovable object moves and the irresistible force stops. This is one rational answer for an irrational question.
Quite simply, there is no such thing as an "immovable object" or an "unstoppable force". In general, what happens when a force acts on an object is described by Newton's Second Law.
This is an exercise in logic. If an unstoppable force exists, then an immovable object cannot exist, because it would be able to be moved by the unstoppable force, and vice versa. Sideways Logic The unstoppable force does not "stop", the immovable object does not move : the unstoppable force ricochets off the immovable object!
the force goes through the object
You can't. Hence the name 'unstoppable'. An unstoppable force, upon hitting something, would push the other object aside and continue onwards. The only problem is if you have both an unstoppable force and an immovable object. The force can't push the object aside, and the object can't stop the force. The solution is fairly simple, however - the unstoppable force is deflected off to the side when the two collide. It isn't stopped, but continues in a different direction. The immovable object doesn't move. Easy. Alternately, the following happens: the unstoppable force continues straight onwards, and the object doesn't move. Since the two can't change in their actions, space itself is twisted to allow the force to pass through the object without moving it in any way. Having an unstoppable force and an immovable object is both theoretically and practically impossible anyway, so this entire line of questioning is fairly pointless.
You mean what happens when an unstoppable force meets an immovable object? Well... that is a paradox. In a world where there is an unstoppable force, by definition, there cannot be an immovable object, and vice versa. And let's just say there were such things. When the collide, there will be an infinite transfer of energy. The unstoppable force will have infinite momentum and the immovable object will have infinite inertia. And when they collide, because according to the law of conservation of energy, energy is never created or destroyed, the energy will be constantly exchanged among the two hypothetical objects.
Quite simply, there is no such thing as an "immovable object" or an "unstoppable force". In general, what happens when a force acts on an object is described by Newton's Second Law.
If the unstoppable object was smaller, then it would pierce a hole through the immovable object, not moving the object, and not stopping.
This is an exercise in logic. If an unstoppable force exists, then an immovable object cannot exist, because it would be able to be moved by the unstoppable force, and vice versa. Sideways Logic The unstoppable force does not "stop", the immovable object does not move : the unstoppable force ricochets off the immovable object!
It would have to be an unstoppable force if the object was immovable.
the force goes through the object
Obviously you can't have both an unstoppable force and an immovable object. If the force moves the object, then the object isn't unmovable. If the force doesn't move it, then the force isn't unstoppable.
Broken Toy - 2009 Unstoppable Force Immovable Object 2-8 was released on: USA: 6 February 2013
Basic paradoxes are examples of questions that cannot be answered. For example, what happens when an immovable object meets an unstoppable force? Since neither an immovable object nor an unstoppable force exist in reality, there is no way to determine what would happen in this theoretical situation. Source: personal experience
You can't. Hence the name 'unstoppable'. An unstoppable force, upon hitting something, would push the other object aside and continue onwards. The only problem is if you have both an unstoppable force and an immovable object. The force can't push the object aside, and the object can't stop the force. The solution is fairly simple, however - the unstoppable force is deflected off to the side when the two collide. It isn't stopped, but continues in a different direction. The immovable object doesn't move. Easy. Alternately, the following happens: the unstoppable force continues straight onwards, and the object doesn't move. Since the two can't change in their actions, space itself is twisted to allow the force to pass through the object without moving it in any way. Having an unstoppable force and an immovable object is both theoretically and practically impossible anyway, so this entire line of questioning is fairly pointless.
You mean what happens when an unstoppable force meets an immovable object? Well... that is a paradox. In a world where there is an unstoppable force, by definition, there cannot be an immovable object, and vice versa. And let's just say there were such things. When the collide, there will be an infinite transfer of energy. The unstoppable force will have infinite momentum and the immovable object will have infinite inertia. And when they collide, because according to the law of conservation of energy, energy is never created or destroyed, the energy will be constantly exchanged among the two hypothetical objects.
Since these are extremes that cannot be acheived due to the laws of physics, it cannot happen. However, If it could happen, I suspect a paradox would occur.
Since these are extremes that cannot be acheived due to the laws of physics, it cannot happen. However, If it could happen, I suspect a paradox would occur.