Q&A: Mechanics and Physics
Mechanics and Physics
Question
Hello Rabbi,
A question for someone with a PhD in physics: in a punch, is there a calculation of the force as half the product of the mass and the velocity? What I don’t understand is, what is the explanation of a pushing force—that is, how does it act? And second, how does this type of force find expression in a punch? That is, is it only the above calculation of force, or is there also some other kind of energy involved (for example, the nervous system that determines speed—what else does it determine, and how does that work)?
Answer
I’m not familiar with such a calculation. Force is the product of mass and acceleration. I didn’t understand any of your questions. I hope you do.
Discussion on Answer
Chinese.
I think the question is about impulse, but I couldn’t figure out what exactly the question is: https://he.wikipedia.org/wiki/%D7%9E%D7%AA%D7%A7%D7%A3
1. Can you explain how applying force works not in a situation of collision—for example a punch or an accident or anything like that—but rather in pushing weights, for example (if you compare it, say, to force applied by a machine to something, like a tractor pushing a rock, etc.)? Because when you write that it’s the product of mass and velocity, that explains more a situation of collision. The question is how it works in a more static situation of pushing.
2. After you answer that, maybe I’ll ask the additional question so it will be less confusing.
Sorry that even as it is, it still may not be clear enough.