Speed or strengh
With speed and weapons u can kill someone REALLY FAST or REALLY SLOW if u hit them with a paralizing star.
With MASSIVE STRENGH most blows (Including stars) would just bounce off and if he would catch u then ur dead cause he could just rip u like a Slim Jim
With MASSIVE STRENGH most blows (Including stars) would just bounce off and if he would catch u then ur dead cause he could just rip u like a Slim Jim
Replies to This Discussion
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Permalink Reply by Jamie Paget on
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I'm going with speed on this, being able to avoid being hit then striking fast would be best I think... plus the faster you hit, the more it'll hurt anyway IMO, after all, a train going 2mph wouldn't do much compared to 50mph would it... its all in the speed.
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Permalink Reply by deth666 on
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Yes but the train has power going with him. If the train was going 50 miles per hour and it was a PERSON then the strengh dude would just swipe him/her from the ground
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Naa, a person moving at such speeds wouldn't be stopped by someone unless they were somehow as dense as a metal wall... its all about the kinetic energy man... I think... Just woke up, to tired to argue my point... someone do it for me.
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Permalink Reply by DiMono on
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It's all about the speed. Being strong means nothing if you're too slow to land a punch. The saying speed kills exists for a reason.
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Aye speed may kill... but I wish they would damn well stop aiming that at Bikers... I see more cars speed than bikes damnit.
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Permalink Reply by Alucard on -
Speed all the way. when you got a ninja skills, a sword, and speed you are going to dominate strong people pretty easily.
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Permalink Reply by Cloud Nerojin on -
Force=Mass x Acceleration
The heavier something is the faster it will go and the more damage it will do. However if it comes to tossing something that "heavy thing" will also drop quicker.
and
"For every action there is an opposite and equal reaction."
Something I learned in my martial arts class is that when you punch and leave your fist in their body some of the energy you put into the punch will come back and hurt your fist. So if you punch and quickly remove your fist back into a blocking position most of the energy will go into your opponent.
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Permalink Reply by Gavin on -
I disagree with this. Obviously, Fnet = m times a, but you have the more advanced concepts wrong. Yes, if an object is heavier AND faster it will deliver more kinetic energy and therefore more damage, but the thing about the speed is that if an object is so much faster than another it can give even more energy but in a more efficient way. Say we have a fast ninja with an arm that weighs 10kg - he throws a punch at 50m/s - that is a 500N punch. A strong ninja with an arm that weighs 20kg due to excess muscle mass throws a punch at 25m/s - same 500N power, but the speed ninja is able to hit and then retreat to avoid damage much more efficiently and is therefore superior in this instance.
Also, it doesn't matter how fast you withdraw your fist from a punch that you land on something. The equal and opposite forces are traded instantaneously - faster than the amount of time is takes light to travel one inch. The same amount of energy is still there -- it's all about punch placement - if you hit your opponent in the stomach when they aren't ready, then it hurts them more than you because your fist is very solid and their stomach is not meant to absorb that much kinetic energy. By the way, Jamie Paget, this is for you.
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Permalink Reply by Cloud Nerojin on
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Cant argue with that.
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Permalink Reply by Indur Dawndeath on -
Not quite - your calculations are a little off.
Remember, the 'a' in F=m.a is acceleration, not speed (though of course, in this instance, the two quantities are related. Or may be related).
Therefore, using the figures you provide:
A) with 10kg of arm/body mass moving behind the punch, and the punch initially moving at 50m/s:
Kinetic energy of the punch = 0.5 × mass × velocity² = 0.5 × 10kg × (50m/s)² = 12500J
B) with 20kg of arm/body mass moving behind the punch, and the punch initially moving at 25m/s:
Kinetic energy of the punch = 0.5 × 20kg × (25m/s)² = 6250J.
(Incidentally, showing that in terms of the maximum amount of kinetic energy that may be delivered by a punch, speed has a bigger effect than mass.)
However, this is only the maximum amount of kinetic energy that may be delivered by the punch - assuming that the punch is entirely stopped in the impact with the target. (IMPORTANT: to deliver the maximum kinetic energy, the punch must be stopped BY the target, NOT the person punching pulling their fist back.)
In terms of the force delivered by the punch, we need to consider the deceleration of the fist. For example, let's consider that in both cases above, during the punch the fist goes from its maximum initial velocity to stationary (again, because of the impact, not the puncher pulling their fist back), in 0.5s.
A) Deceleration of the fist = change in velocity / time taken for the change
= 50m/s / 0.5s
= 100m/s²
Therefore, Force delivered by the punch = mass × deceleration
= 10kg × 100m/s²
= 1000N
B) Deceleration of the fist = 25m/s / 0.5s
= 50m/s²
Therefore, Force delivered by the punch = 20kg × 50m/s²
= 1000N
In other words, though the force of the two punches is the same, the energy (and therefore the potential for causing damage) of the faster punch is greater. This is why speed is important.
The problem with most people, however, is that when they try to make a strike faster, they typically sacrifice a lot of the body mass behind the strike, as well as other features of good technique - for example, falling into the habit of pulling the fist back TOO soon, thus not delivering all energy in the strike. This is why it is essential in martial arts to practice correct technique slowly at first (and for a lot longer than we might think) - in order to give our brain and body time to have correct technique thoroughly ingrained. Speed must be built up naturally.
Strength is important. Speed is more important. Correct technique is vital.
As far as the Newton's Third Law bit (equal and opposite forces) is concerned, quite right. That's why it is essential to tense the fist and wrist at point of impact - in order to avoid the energy of the strike damaging your own body.
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Permalink Reply by Indur Dawndeath on
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Physics geek and proud, baby!
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Permalink Reply by The Iron Hand in a Velvet Glove on -
yes you are a physics wraith
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