SAT2物理中的一道题The International Space Station is currently under construction.Eventually,simulated earth gravity may become a reality on the space station.What would the gravitational field through the central axis be like under these cond

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SAT2物理中的一道题TheInternationalSpaceStationiscurrentlyunderconstruction.Eventually,simulatedearthgravity

SAT2物理中的一道题The International Space Station is currently under construction.Eventually,simulated earth gravity may become a reality on the space station.What would the gravitational field through the central axis be like under these cond
SAT2物理中的一道题
The International Space Station is currently under construction.Eventually,simulated earth gravity may become a reality on the space station.What would the gravitational field through the central axis be like under these conditions?
(A)zero
(B)0.25g
(C)0.5g
(D)0.75g
(E)1g
这题没太看懂是啥意思,不知道该从何下手.（答案是A）
一楼的解释感觉不太对～

SAT2物理中的一道题The International Space Station is currently under construction.Eventually,simulated earth gravity may become a reality on the space station.What would the gravitational field through the central axis be like under these cond
答案是：A.
详细过程如下：
题目翻译：国际空间站现在正在建造中.最终,模拟的地球重力将可能在太空站上成为可能.请问,在这些条件下,位于空间站中轴的引力场是多少?
对于题目的理首先必须要明白题目在问什么.宇宙中不可能存在一个地方没有引力场.太空站虽然貌似飘在空中不受力,但是那是假象.地球的引力作为向心力在让太空站做圆周运动.有引力的地方肯定有引力场,不然引力也不可能存在.那么,题目问的是什么呢?其实题目问的是太空站既然能产生“模拟的地球重力”,那么请问在其中轴上“发出”这“模拟引力”的引力场强在是多少呢?
解析：要明白答案,就必须知道太空站是如何模拟出“引力”的.可以做一个实验：拿一个小石子,绑上绳子,拿在手中甩.这个时候,如果排除引力和空气阻力,小石子就只受到一个向心力,这个力方向沿着绳子指向轨道中央.
现在看我的图,是不是和我所说的一样?在一个如同自行车轮子的太空站上,那个宇航员如同小石子,在太空站上飞速地围绕着圆形的太空舱体运动,其受到的加速度方向朝着太空站的中轴.由于宇航员是头冲着中轴的,他的主观体验便仿佛自己受到了“引力”一般,身体被往脚底下压.这就是模拟引力的原理.
由于这个模拟的过程完全是利用向心力,和引力本身没有关系,所以轴心位置引力场自然为0.
注：引力场单位和加速度单位相同.

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