Originally posted by frankenfrank
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just as with the innital impact theres the elasticity of the impact factoring into just how much force is conveyed into the impact coming from the kinetic energy.
now to this there are a million and a half different factors mainly around the movement of the head and its resistance to move. if the head were say a 20 lb ball hanging from the ceiling the faster punch is able to convey more of the kenitic energy to the ball before the ball flys away. as well when dealing with an actual human when the faster hit hits in the head the energy is more concentrated in the head where as with the hit then push the initial shot is concentrated to the head but alot of the follow through energy is transfered to the body and not the actual rattling of the brain which causes a KO.
and punching up or down dosnt matter its alittle more difficult to punch up due to gravity but its only difficult on your stamina, not to restrict how hard on can punch. when the rock punched upwards he was pretty much jumping in the air with his whole body weight and the force of his legs behind his punches.
on top of that when your punching downwards you have the acceleration of gravity helping you, but thats only 9.8 meters per second which after a second would be about 20 mph. I dont know any one that takes a whole second to punch, that little 9.8 meters persecond is nothing compared to the acceleration from your feet.
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