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[–] Crux 2 points 5 points (+7|-2) ago 

It is actually called the collapsing principal. It is how martial artist break a bunch of bricks so long as there are spacers between them.


[–] Banned4Truth 1 points 3 points (+4|-1) ago 

Except that's not how it happened. The force of inertia, even for expert Karate choppers, doesn't always break all the bricks. Many times you will see them break only half of them and not the last. This is because the force is being pushed back by the next brick. Newton's 3rd law. The pancake theory relies on the weight of each subsequent floor adding to the inertia. If you apply the same theory to karate chops, then the final brick at the bottom should almost always be broken. But this is never the case 100%. To top it off, the karate chop must be precisely dead center else all fail.


[–] Crux 0 points 0 points (+0|-0) ago 

I get what you mean. Otherwise it would get easier the more bricks you stack. If you could somehow isolate just the force needed for the 2nd brick, it would be less than the first. But the sum of them together makes it harder to break both.