Science and nonsense in Science and nonsense in the martial artsthe martial arts
Science and nonsense in Science and nonsense in the martial artsthe martial artsNYC Skeptics SkeptiCamp 2010
John Rennie
NYC Skeptics SkeptiCamp 2010John Rennie
V = volume of block
δ= modulus of rupture ≈ stress material can handle
E = modulus of elasticity ≈ stiffness
V = volume of block
δ= modulus of rupture ≈ stress material can handle
E = modulus of elasticity ≈ stiffness
Critical energy to break a block = Vδ2/2ECritical energy to break a block = Vδ2/2E
F = ∆mv/∆t = (45 kg-m/s)/0.004 s ≈ 104 N F = ∆mv/∆t = (45 kg-m/s)/0.004 s ≈ 104 N
= 2,250 lbs.= 2,250 lbs.
Dim mak: death touch techniques?Dim mak: death touch techniques?