can you make a bulletproof shield from the sword or samurai by rotating it vertically?
2006-08-17 08:21:42 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Physics
can I personally? no.
can it be done?... like by superman?
it took a lot of engineering calculations to figure out how to shoot bullets from the front and center of an airplane without shooting your own propeller off back in about world war 1
timing and synchronization is key
i saw a history channel show about it
well therefore i guess your hand/eye coordination would be the main factor of concern
2006-08-17 10:08:40 · answer #1 · answered by Anonymous · 0⤊ 0⤋
No - The rate of spinning necessary is beyond current technology either by manually or by machine. It would have to spin at a rate that causes the blade to come around (make a complete rotation) in the time it takes the bullet to move the distance of a small portion of the bullet (Much less than the length of the bullet). If it rotated at a speed less than this, either the bullet will miss the blade or the bullet will be deflected and possibly be deflected into the person rotating the sword.
Besides. The speed that it must rotate at would probably cause the sword to shatter under its own weight and tensile strength.
It would be best to flatten the sword into a shield.
2006-08-17 10:26:33 · answer #2 · answered by jdomanico 4 · 2⤊ 0⤋
If the sword is rotating with a period that is smaller than the amount of time it takes the bullet to go a distance equal to it's lenght, then the bullet would inevitably get hit by the sword. The question is what happens then, because if the bullet is just deflected into another part of the body, then the entire system is not bulletproof, is it? But no human could spin the sword that fast.
2006-08-17 08:39:59 · answer #3 · answered by weaponspervert 2 · 2⤊ 0⤋
The muzzle velocity of a handgun is around 1200 m/s. A 9mm round is 0.009 meters long. Therefore, it takes a round 0.009/1200 seconds, or 0.0000075 seconds to pass through a given point in its trajectory. Let's say this given point is the plane through which the sword is rotating. In order to form an effective shield, the bearer of the sword would have to rotate it at one revolution every 0.000075 seconds in order to be sure of deflecting every bullet in its range. This is equivalent to over 130,000 revolutions per second, well above the angular velocity of a power saw, let alone how fast a human can spin it.
Even assuming that the sword intercepts the bullet, you can't be sure the bullet won't just penetrate the sword or deflect off of it at a angle that will still allow it to hit the target.
2006-08-17 10:11:59 · answer #4 · answered by knivetsil 2 · 2⤊ 1⤋
The short answer is yes. To see the proof go to You Tube ( Katana VS Pistol. http://www.youtube.com/watch?v=F2lOK5KSiOw&mode=related&search= Watch the full video.
2006-08-17 08:38:32 · answer #5 · answered by JUNK MAN 3 · 2⤊ 1⤋
No
2006-08-17 10:38:12 · answer #6 · answered by whoevermeam 3 · 0⤊ 0⤋
If you could do it fast enough.. sure , why not?
2006-08-17 08:27:27 · answer #7 · answered by Imani 5 · 0⤊ 1⤋
Yes expert can but i can not.
2006-08-17 08:54:59 · answer #8 · answered by Anonymous · 1⤊ 2⤋
I cannot do that. can u?
2006-08-17 11:57:28 · answer #9 · answered by sherrylboodramhot 2 · 0⤊ 0⤋
no
2006-08-17 08:44:36 · answer #10 · answered by ♥JAMIE♥ 2 · 1⤊ 0⤋