Maybe I don't understand physics but size=power, right?

Body mechanics allow you to punch with your whole weight, it`s all in the techniqu and has to have speed, no point in throwing a punch with no speed is there?

 

i dont think most people understand what those terms mean. weight provides the torque. in other words, you can exert more force, with more weight, because it allows you to push harder against opposing forces. if the opposing force has less weight, it must give. better balance provides more usable weight.
stand 2 feet from a wall. now put your fists against the wall and lean in as close to it as possible. now push off with your fists. easy. now stand 4 feet from the wall and do the same thing. not as easy, requires more torque, but the angle you have now, because youre farther away, allows you to generate more torque. you can push harder against the wall because youre better able to anchor down on the ground and use it as weight to push off of.

 

That's the point of rehydration clauses, to prevent unfair fight night weight advantages.

 

Shawn Porter is a fighter with good size and speed for his divisions but the power isn’t there due to his technique. The timing and distance in punches are horrible because he smother his shots standing in the pocket. Floyd despite not being a power puncher at 147 might have punched harder than Shawn despite the obvious physical differences.

 

From a physic forum:

This is a difficult subject to get theoretical about (but fascinating). When talking about the possible damage a collision can cause (which is what this is all about) there are three factors which need to be 'right'. One is Momentum and one is Kinetic Energy. In addition, there is the force that the muscles exert directly on the body of the recipient (the push). It is actually possible to push someone over with no approach velocity. That force won't do much actual direct bodily damage so I will not consider it. An express train, travelling at 10km/hr is probably unlikely to do much harm to a small bird that it collides with because the main effect will just be to speed up the bird. All that Momentum of the train can't be 'used' in the collision. It would be just the same as if the bird flew into a window in your house; it would just be a bit shaken. Momentum is Mass times Velocity and Kinteic Energy is Half Mass times velocity squared. The two are, of course, related but two objects (a light one and a heavy one) can have the same Momentum but the lighter one (going faster) will have more Kinetic Energy. Faster bullets can often penetrate better but a bigger calibre bullet with the same charge can often do more damage. 0.177inch air gun pellets travel faster and are more accurate but a 0.22 inch pellet will knock down an animal better at short range. That example is a bit easier to quantify than what happens with a punch. It's hard to decide what actually 'counts'. It could vary from physique to physique. Except when there is a gross mis-match between the fighters, boxing is as much about wearing your opponent down so that they cannot handle your punches, as what a single punch can do to cause a KO (pretty rare). Your veteran boxer friend probably got it right but didn't use the terms that are strictly applicable to Physics.

Source https://www.physicsforums.com/threads/applying-physics-to-boxing-does-speed-create-power.842032/

 

Mass x speed = power

 

Mechanics. You take the same 203 pound fighter and have him throw a punch with both his feet side by side, instead of the traditional stance fighters use, basically taking his legs away and he will not generate the same force. He is not getting his full body weight behind the punch.

 

People gotta stop saying mass. Mass is simply size, a balloon can have a lot of mass, and weigh nothing.

 

Exactly.

Mass has nothing to do with weight.

A beach ball has greater mass than a cricket ball but is nowhere near as heavy.

 

Wrong

"Mass is both a property of a physical body and a measure of its resistance to acceleration (rate of change of velocity with respect to time) when a net force is applied."

https://en.wikipedia.org/wiki/Mass

 

Velocity = Power / Force, the other way round buddy.

 

You’re confused. Mass is the amount of particles you are comprised of and the resistance to acceleration thing is the required force to move said mass.

You’re not changing your mass mid-punch and punching power is not simply how fast you can throw your bodyweight. You could throw your hand super fast and loosely and it would fit right into your massXacceleration, and the punch is still trash. Punching power is leverage, torque, rigidness etc, i.e ways to multiply your weight and apply it to something/one else. You don’t multiply the particles you’re made of, you multiply weight via gravity/mechanics. An uppercut isn’t straight up, it’s like a little bolo, you dip and torque, it’s almost the same motion of a swing, utilizing the pull of gravity for acceleration.If there is no gravity, you’re mass means little, the speed you are shooting that mass mean’s little, unless you’re shooting laser fists that penetrate.

 

Well, while physics is fundamental and proved thing, in fighting like boxing etc effect from a punch depends a lot also from placement, angles, opponent's movement ( direction, angles and speed ) in moment when they had get punched etc factors.

This is reason why sometimes opponent after get dropped impressively might had get up and sometimes continue to fight smoothly and sometimes someone maybe even did not had been dropped but he just can't start to fight next round. In forums this usually is called as like ***** had quit.

This is also reason why sometimes guy punched out of the ring might climb up and continue to fight, sometimes lad had died after fight ended till judges cards with 0 knockdowns in this fight.
Ofc " chin " too does matters, like ribs etc stuff too.

 

Correct. Mass is not therefore "simply size".

 

There's a lot that goes into the speed and force of a punch, aside from the factors you mentioned. This forum's search function, as well as this Google page have a lot of good places to start: https://www.google.com/search?chann...into+the+speed+and+power+of+a+punch+in+boxing