News for hackers. Stuff that matters.

A comment on Karate physics: How your hand can break concrete without breaking itself. Parent comment

Re:Karate physics: How your hand can break concrete without ... by MarcScott on Friday May 03, 2024 @04:54PM (#40252276)
Your board holders also have a significant input on your success. If they hold the board, but let their arms flex, then they absorb too much of the energy of the strike. They can make it easier for you as well, by flexing the board inwards towards them.

I've gone through boards with a one inch punch with barely any effort, and also failed several times, and it has always been down to the person or persons holding the board for me.

[ Parent | on HN ]
Re:Karate physics: How your hand can break concrete without ... by entropicdrifter on Friday May 03, 2024 @05:22PM (#40252536)
The only board breaks that are really impressive to me are speed breaks, where the board is either held one-handed (either by the person doing the break or an assistant) or is mid-air when struck.

That at least takes a measure of skill.

[ Parent | on HN ]
Re:Karate physics: How your hand can break concrete without ... by reactordev on Friday May 03, 2024 @08:14PM (#40253722)
But shows you just how easily they do break. However because we think “board” we assume it’s cut grain wise like a normal person. They aren’t and are about as strong as a chopstick.
[ Parent | on HN ]