Speed Vs Power

[PhotonGuy4]

But, but, but....

Yes, and if you want to be effective you have to take all the buts into account.

 

[Kung Fu Wang102]

Well there is more to it than just speed with being able to block somebody's punch, there is also technique, timing, strategy, and so forth.

What do technique, timing, strategy can play in the following speed test?

- Both you and your opponent have right side forward.
- Both you and your opponent drop hands straight down next to the knees.
- You try to use right hand to punch your opponent's left back shoulder.
- Your opponent tries to block your punch with his right leading arm.
- If your right hand can pass your opponent's leading arm block, and hit his left back shoulder, you have proved your excellent speed.
- If your right hand cannot pass your opponent's leading arm block, and hit his left back shoulder, you don't have excellent speed.

 

[Haruhiko]

But there are other factors that have to be accounted for. For instance you have to specify what kind of punches we're talking about. With some punches your hand travels a very short distance as opposed to other punches where your hand covers a longer distance. The less distance you have to cover the more punches you will be able to throw per second. You will most likely be able to throw more lead hand jabs per second than rear hand straight punches as your hand has to cover a greater distance with the rear hand straight punch, but that does not mean your hand moves at a higher speed in MPH when throwing the lead hand jab as opposed to the rear hand straight punch.

Also somebody with shorter arms might be able to throw more punches per second because with shorter arms their hands will have to cover less distance to complete the punch as opposed to somebody with longer arms, but that also does not mean that the hands of somebody with shorter arms are going to be moving faster in MPH than the hands of somebody with longer arms.

You also have to take into account the time in between punches. With shorter intervals in between punches you will obviously be able to throw more punches in a given amount of time but that again is different than how fast your hand moves in MPH.

So it depends on what kind of speed we're talking about.

Well there is more to it than just speed with being able to block somebody's punch, there is also technique, timing, strategy, and so forth.

Don't use the imperial system when doing physics, just don't. It's a pet peeve.

EDIT: AHHHHHH what do I do, I revived the thread!? Back row. Under the projector, please.

 

[Wing Woo Gar37]

Don't use the imperial system when doing physics, just don't. It's a pet peeve.

EDIT: AHHHHHH what do I do, I revived the thread!? Back row. Under the projector, please.

This is your fault now.

 

[Wing Woo Gar37]

Don't use the imperial system when doing physics, just don't. It's a pet peeve.

EDIT: AHHHHHH what do I do, I revived the thread!? Back row. Under the projector, please.

Although it will be a month before we see it.

 

[Prince_Alarming102]

Anyone fancy a pun?

 

[Wing Woo Gar37]

Anyone fancy a pun?

Make it rhyme though…

 

[Prince_Alarming102]

OK I'll just go pick some celerity from the garden for dinner

 

[Prince_Alarming102]

Only I think we might need to use some force over time

 

[HighKick1]

Don't use the imperial system when doing physics, just don't. It's a pet peeve.

EDIT: AHHHHHH what do I do, I revived the thread!? Back row. Under the projector, please.

Odd, but using it for over 45-years in physics with no issue.

 

[Wing Woo Gar37]

Only I think we might need to use some force over time

That could be massive.

 

[Prince_Alarming102]

Yes, but I think the OP is expecting an equal and opposite reaction

 

[PhotonGuy4]

Don't use the imperial system when doing physics, just don't. It's a pet peeve.

You must not be from the USA.

 

[Fungus94]

Yes, but I think the OP is expecting an equal and opposite reaction

Force [integrated] over time = impulse
Impulse and reaction impulse is always the same (Newtons 3rd law)

This holds independent of details of mass or speed of the objects delivering impulse.

 

[Prince_Alarming102]

I'm sorry, I had the impulse to post that

 

[Haruhiko]

Odd, but using it for over 45-years in physics with no issue.

H-how? Newtons, mass, energy, light, speed etc are ALL measured by scientists in the metric system, deliberately so. NASA leart this the hard way

 

[Haruhiko]

Force [integrated] over time = impulse
Impulse and reaction impulse is always the same (Newtons 3rd law)

This holds independent of details of mass or speed of the objects delivering impulse.

And if you chuck imperial measurement into a METRIC based system you end up with crashing spacecraft and inconsistent laws of physics.

 

[Fungus94]

And if you chuck imperial measurement into a METRIC based system you end up with crashing spacecraft and inconsistent laws of physics.

Only if one mix up and confuse the concepts of physical quantity, numerical value and unit.

In theoretical physics one commonly uses "natural units" such as Planck units, this is to make the equations cleaner when you work with them. Physical law when written with declared units and not just numerical values are universal and invariant with respect to human made up units or conventions.

 

[Haruhiko]

Only if one mix up and confuse the concepts of physical quantity, numerical value and unit.

In theoretical physics one commonly uses "natural units" such as Planck units, this is to make the equations cleaner when you work with them. Physical law when written with declared units and not just numerical values are universal and invariant with respect to human made up units or conventions.

Yes, but Planck constants are constants.

Metric vs Imperial systems are competing constants. And because Newton revolutionised physics, that scientific domain is heavily dependant on metric.

 

[Fungus94]

I think you mix up physical constants with systems of units.

Imperial or SI units, are simply units, not constants of nature.

The constants of nature, speed of light, plancks constant, gravitational constants etc are physical quantities.
These can be express in different units and that is fine.

Equations of physics work on physical quantities, and remain regardless of choice of unit.
F=ma is true wether you use imperial or SI units, or some other home made untis (also allowed).