[Even if the punch decelerates as it penetrates, if the initial impact is the same, then the damage it does is at least the same.
---Not true. Read some of the further responses from others. Impact is also relative to the target itself. And compare two punches that both land on the ribcage traveling at the same speed with the same mass and therefore the same impact. One punch accelerates through the target while the other one decelerates and dissipates its force. Which punch will do the most damage? I would posit that the first punch is not "pushing", it simply has better penetration. The second punch "pushes".
As it penetrates, the struck body will be suddenly and traumatically displaced, causing potential further damage. The head gets whipped around when the side of the chin is punched, for example. That whiplash alone can be very damaging.
---That is only because hitting someone on the chin so that their head whips around offers little resistance to the punch compared to hitting them in the soft abdomen or in the chest. There is little deceleration when hitting someone on the chin. Therefore the punch penetrates and doesn't "push" much more easily than striking the abdomen or chest.
If the speed is sufficient AND the body behind it is stable enough for it to land solidly, then the punch is effective. That holds true whether you do or do not seek to penetrate further.
---Any punch can be effective. Heck, a 10 year old girl can throw an effective punch depending upon the circumstances. But not every punch is optimal. I like to punch optimally for the circumstance.
Newtonian physics is relevant, but not as straight forward as that.
---Like I already said, F = M * A over simplifies things, but at least it gives a way to start thinking about the dynamics.
---Not true. Read some of the further responses from others. Impact is also relative to the target itself. And compare two punches that both land on the ribcage traveling at the same speed with the same mass and therefore the same impact. One punch accelerates through the target while the other one decelerates and dissipates its force. Which punch will do the most damage? I would posit that the first punch is not "pushing", it simply has better penetration. The second punch "pushes".
As it penetrates, the struck body will be suddenly and traumatically displaced, causing potential further damage. The head gets whipped around when the side of the chin is punched, for example. That whiplash alone can be very damaging.
---That is only because hitting someone on the chin so that their head whips around offers little resistance to the punch compared to hitting them in the soft abdomen or in the chest. There is little deceleration when hitting someone on the chin. Therefore the punch penetrates and doesn't "push" much more easily than striking the abdomen or chest.
If the speed is sufficient AND the body behind it is stable enough for it to land solidly, then the punch is effective. That holds true whether you do or do not seek to penetrate further.
---Any punch can be effective. Heck, a 10 year old girl can throw an effective punch depending upon the circumstances. But not every punch is optimal. I like to punch optimally for the circumstance.
Newtonian physics is relevant, but not as straight forward as that.
---Like I already said, F = M * A over simplifies things, but at least it gives a way to start thinking about the dynamics.