kai-kai
加入时间: 2004/03/25
文章: 2225
经验值: 10951
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作者：kai-kai 在 罕见奇谈 发贴, 来自 http://www.hjclub.org
人民的质疑 6: how much 动量a bullet has than can hit in 吕秀莲's knee?
how much 动量 a bullet has than can hit in 吕秀莲's knee?
this like high school home work. acturely it is as simple as a high school home work if we just roughly count it. so every body here can do it.
we have two way to measure it out. one is count it out another is test it.
how to count it?
we know F=m* a. so we know any thing in movemen will not stop by it's self. it has to meet another force against it than will loss 动量.
here we find out the F is important, and not too hard, can find out on net. this F is the one which can break 吕秀莲所穿的长裤,护膝，and 1 or 2 cm of body.(here is kind of funny, at knee, actruely all are skin and bone. we ignore this)
find out the F than you can count out the 动量 befor it hit 吕秀莲's knee, than you can count out the initial speed from the car window. and plus the 动量 to break the window, than you can count out how much initial 动量 from the gun. you also can figue out how much 子弹的弹壳装药量.
good home work.
second way is test it out.
get a similar as 吕秀莲所穿的长裤,护膝，and get a 1 to 2 cm thick rubber to instead of knee.(it's kind of funny, but they said hit in 1 to 2 cm. what can we do)
put all these together. than you throw something like the bullet to it. until break all these at one time. measure out the power.
same, you can figue out how much 动量 a bullet has than can hit in 吕秀莲's knee. this also a good home work for high school students. try it.
ok, now we figued out the 动量. we can try to hit ourself's knee. what's the feeling?
but before try, I suggest you to ask your doctor frist. it's too danger I think. maybe you can break your leg. not like 吕秀莲 just stand there after 15 minites than say oops, looks like someting hit me.
作者：kai-kai 在 罕见奇谈 发贴, 来自 http://www.hjclub.org |
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人民的质疑 6: how much 动量a bullet has than can hit in 吕秀莲's knee?
