woodworkingboy
TreeHouser
Marc-Antoine, good point on species variation and moisture content affecting wood bending strength. A slower rate of bend (pull) perhaps allows more time to tailor a hinge to prevent barberchair, but it doesn't much affect the strength of wood. Testing shows that wood has minimal increase in resistance to breakage due to slower bending stresses being put on it. The same species and moisture content will break at very close to the same level of deflection when arriving at that point at different rates. Right about momentum going as being in your favor in some situations.