while one end of the board is being raised,what is the effect on the force of friction between the board and the object?答案给的是steadily increases为啥呢?回复一楼的:没有图,它属于前几题的 不好意思补充下:前面题设
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whileoneendoftheboardisbeingraised,whatistheeffectontheforceoffrictionbetweentheboardandtheobject?答案
while one end of the board is being raised,what is the effect on the force of friction between the board and the object?答案给的是steadily increases为啥呢?回复一楼的:没有图,它属于前几题的 不好意思补充下:前面题设
while one end of the board is being raised,what is the effect on the force of friction between the board and the object?
答案给的是steadily increases为啥呢?
回复一楼的:没有图,它属于前几题的
不好意思补充下:前面题设还说是转到50°就停了.也就是说,三楼的细致地讲下为什么增大就好了
while one end of the board is being raised,what is the effect on the force of friction between the board and the object?答案给的是steadily increases为啥呢?回复一楼的:没有图,它属于前几题的 不好意思补充下:前面题设
如果物体不动的话那么:
静摩擦力f、重力G、支持力N回力应该为0
很容易得到f=Gsina,a为倾斜角
sina在0度
英语翻译the report is fastened to one end of a pole while the boy is holding the other end
players move towards one end of the court while throwing the ball to each other讲解一下句中while 的用法
What is the end of one hundred?
come and the end of one’s
the elevator at one end of the building 中文?one end of 怎么翻译
end of part one
At one end of the spectrum,you have the default
英语翻译as for the little old woman,she took off her cap and balanced the point on the end of her nose,while she counted One two three in a solemn voice.
The end of the
It's necessary for players to move quickly towards one end of the court while throwing the ball to each other.句子中为什么throw要加ing ,throw不是瞬间动词吗?是否表示主动?
from one end of the earth to the other .我总觉得也可以说from one end of the earth to the other .oneone
The end of our
The end of
End Of The World
end of the
through the end of
End of the Trail
翻译下面初二的英语 快The owner(店主) was selling drinks at one end of the long bar(柜台) while a waiter(招待员) was selling drinks at the other end. My friend and I can't agree, Jack went up to the owner and said, I say there