No, that's not true.
Try karate chopping yourself on the forearm as hard as you can, without pulling at all. Just swing your arm down and push. As you can feel, there is plenty of force.
The pull is more about control, and readying yourself for your next defense or your next strike.
Try karate chopping yourself on the forearm as hard as you can, without pulling at all. Just swing your arm down and push. As you can feel, there is plenty of force.
The pull is more about control, and readying yourself for your next defense or your next strike.
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force and collision dynamics has a simple rule but in actual physical collisions the material response is complicated
F force = Mass x Acceleration change of velocity
action reaction F of a on B = exactly F B on A
But the material and mass and engineering strength of the objects A and B determine which suffers the most damage
hit a ping pong ball with a bat, an egg with a bat, a bowling ball with a bat
different results. different interaction forces and motions and accelerations
the force of a fist against a nose is the same as the force of the nose against the fist
but nose will probably break and fist will only be bruised.
part of the damage is "follow through", part is relative mass of two objects.
F force = Mass x Acceleration change of velocity
action reaction F of a on B = exactly F B on A
But the material and mass and engineering strength of the objects A and B determine which suffers the most damage
hit a ping pong ball with a bat, an egg with a bat, a bowling ball with a bat
different results. different interaction forces and motions and accelerations
the force of a fist against a nose is the same as the force of the nose against the fist
but nose will probably break and fist will only be bruised.
part of the damage is "follow through", part is relative mass of two objects.