向天開槍:
回答 (3)
2007-05-02 7:37 pm
✔ 最佳答案
〈澳門日報〉消息︰對於“突然一槍”，治安警察局代局長李小平解釋，警員見有老婦被推撞跌倒，為免“人踩人”，於是開槍示警。“突然一槍”又是“離奇一槍”。
昨日下午三時（與開槍時間相若），一名任職賭場的男子駕電單車由菜農學校往三角花園方向，至三角花園交通燈前停下，突感肩部劇痛，發現肩部有血洞，送山頂醫院檢驗後證實體內留有彈頭，送鏡湖醫院深切治療部，今日凌晨零時經手術取出夾在鎖骨的彈頭，司警亦已取走彈頭化驗，傷者情況穩定。至於是否為當時的流彈所傷，仍待警方比對查證。
本人認為開槍者(警員)需負上責任但澳門政府之有關部門需要賠償對傷者的醫療費及療養時而不能如常上班之工資。
參考: 〈澳門日報〉
2007-05-04 1:53 am
因司警無知,魯莽, 疏忽,傷及無辜, 你說誰該負責?
不要說物理, 也不用騙人, 向天開槍的確是十分危險, 特別是在鬧市, 1920 年美軍做了試驗如下(english). 不信叫何厚華自己試試, 死撐無用, 還說自己是警務人員又配槍, 又說是司警代表, 做法正確,鬧劇一場!
'Based on this information, a falling 150 gr. service bullet would not be lethal, although it could produce a serious wound.'
Topic of the Month: March 2001
Bullets in the Sky
We frequently get questions about firing bullets vertically into the air. The most frequent question is, "Will bullets fired into the air return to the earth at the same speed they left the gun?" Other questions asked are; "How far does the bullet travel when fired vertically and how long does it take to come down, or does the falling bullet have enough energy to be lethal should it strike someone on the ground?"
Some have tried vertical shooting, but very few have had any luck hearing the bullet come back and strike the ground. When a bullet is fired vertically it immediately begins to slow down because of the effects of gravity and air drag on the bullet. The bullet deceleration continues until at some point the bullet momentarily stops and then it begins to fall back toward earth. A well-balanced bullet will fall base first. Depending on bullet design, some bullets may tumble on their way down and others may turn over and come down point first.
The bullet speed will increase until it reaches its terminal velocity. The bullet reaches terminal velocity when the air drag equals the pull of gravity or stating it another way, the bullet weight and drag are balanced. Once this velocity is achieved the bullet will fall no faster.
In 1920 the U.S. Army Ordnance conducted a series of experiments to try and determine the velocity of falling bullets. The tests were performed from a platform in the middle of a lake near Miami, Florida. The platform was ten feet square and a thin sheet of armor plate was placed over the men firing the gun. The gun was held in a fixture that would allow the gun to be adjusted to bring the shots close to the platform. It was surmised that the sound of the falling bullets could be heard when they hit the water or the platform. They fired .30 caliber, 150 gr., Spitzer point bullets, at a velocity of 2,700 f.p.s. Using the bullet ballistic coefficient and elapsed time from firing until the bullet struck the water, they calculated that the bullet traveled 9,000 feet in 18 seconds and fell to earth in 31 seconds for a total time of 49 seconds.
As a comparison, the .30 caliber bullet fired in a vacuum at 2,700 f.p.s. would rise nearly 21.5 miles and require 84 seconds to make the ascent and another 84 seconds to make its descent. It would return with the same velocity that it left the gun. This gives you some idea of what air resistance or drag does to a bullet in flight.
Wind can have a dramatic effect on where a vertically fired bullet lands. A 5 mile per hour wind will displace the 150 gr. bullet about 365 ft based on the time it takes the bullet to make the round trip to earth. In addition the wind at ground level may be blowing in an entirely different direction than it is at 9,000 feet. It is no wonder that it is so difficult to determine where a falling bullet will land.
Out of the more than 500 shots fired from the test platform only 4 falling bullets struck the platform and one fell in the boat near the platform. One of the bullets striking the platform left a 1/16 inch deep mark in the soft pine board. The bullet struck base first.
Based on the results of these tests it was concluded that the bullet return velocity was about 300 f.p.s. For the 150 gr. bullet this corresponds to an energy of 30 foot pounds. Earlier the Army had determined that, on the average, it required 60 foot pounds of energy to produce a disabling wound. Based on this information, a falling 150 gr. service bullet would not be lethal, although it could produce a serious wound.
參考資料:
http://www.loadammo.com/Topics/March01.htm
不要說物理, 也不用騙人, 向天開槍的確是十分危險, 特別是在鬧市, 1920 年美軍做了試驗如下(english). 不信叫何厚華自己試試, 死撐無用, 還說自己是警務人員又配槍, 又說是司警代表, 做法正確,鬧劇一場!
'Based on this information, a falling 150 gr. service bullet would not be lethal, although it could produce a serious wound.'
Topic of the Month: March 2001
Bullets in the Sky
We frequently get questions about firing bullets vertically into the air. The most frequent question is, "Will bullets fired into the air return to the earth at the same speed they left the gun?" Other questions asked are; "How far does the bullet travel when fired vertically and how long does it take to come down, or does the falling bullet have enough energy to be lethal should it strike someone on the ground?"
Some have tried vertical shooting, but very few have had any luck hearing the bullet come back and strike the ground. When a bullet is fired vertically it immediately begins to slow down because of the effects of gravity and air drag on the bullet. The bullet deceleration continues until at some point the bullet momentarily stops and then it begins to fall back toward earth. A well-balanced bullet will fall base first. Depending on bullet design, some bullets may tumble on their way down and others may turn over and come down point first.
The bullet speed will increase until it reaches its terminal velocity. The bullet reaches terminal velocity when the air drag equals the pull of gravity or stating it another way, the bullet weight and drag are balanced. Once this velocity is achieved the bullet will fall no faster.
In 1920 the U.S. Army Ordnance conducted a series of experiments to try and determine the velocity of falling bullets. The tests were performed from a platform in the middle of a lake near Miami, Florida. The platform was ten feet square and a thin sheet of armor plate was placed over the men firing the gun. The gun was held in a fixture that would allow the gun to be adjusted to bring the shots close to the platform. It was surmised that the sound of the falling bullets could be heard when they hit the water or the platform. They fired .30 caliber, 150 gr., Spitzer point bullets, at a velocity of 2,700 f.p.s. Using the bullet ballistic coefficient and elapsed time from firing until the bullet struck the water, they calculated that the bullet traveled 9,000 feet in 18 seconds and fell to earth in 31 seconds for a total time of 49 seconds.
As a comparison, the .30 caliber bullet fired in a vacuum at 2,700 f.p.s. would rise nearly 21.5 miles and require 84 seconds to make the ascent and another 84 seconds to make its descent. It would return with the same velocity that it left the gun. This gives you some idea of what air resistance or drag does to a bullet in flight.
Wind can have a dramatic effect on where a vertically fired bullet lands. A 5 mile per hour wind will displace the 150 gr. bullet about 365 ft based on the time it takes the bullet to make the round trip to earth. In addition the wind at ground level may be blowing in an entirely different direction than it is at 9,000 feet. It is no wonder that it is so difficult to determine where a falling bullet will land.
Out of the more than 500 shots fired from the test platform only 4 falling bullets struck the platform and one fell in the boat near the platform. One of the bullets striking the platform left a 1/16 inch deep mark in the soft pine board. The bullet struck base first.
Based on the results of these tests it was concluded that the bullet return velocity was about 300 f.p.s. For the 150 gr. bullet this corresponds to an energy of 30 foot pounds. Earlier the Army had determined that, on the average, it required 60 foot pounds of energy to produce a disabling wound. Based on this information, a falling 150 gr. service bullet would not be lethal, although it could produce a serious wound.
參考資料:
http://www.loadammo.com/Topics/March01.htm
2007-05-02 8:54 am
開天開槍得個槍殼跌返落嚟咁點會擊傷人 = ="
其實如果係打斜開槍射中人咁就可能要負,視乎開槍嗰個係邊個.平民有槍械唔使講一定拉.如果係差人可能要告上發庭
2007-05-02 00:54:58 補充：
打錯,係法庭呀
其實如果係打斜開槍射中人咁就可能要負,視乎開槍嗰個係邊個.平民有槍械唔使講一定拉.如果係差人可能要告上發庭
2007-05-02 00:54:58 補充：
打錯,係法庭呀
收錄日期: 2021-04-13 00:49:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070502000051KK00170