大师作文网It takes a satellite 1.76 h to revolve around an unknown ast
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It takes a satellite 1.76 h to revolve around an unknown asteroid in a circular orbit of radius 540 km.
How long it will take an object without initial speed to reach surface of the asteroid from this orbit?The radius of the asteroid is very much smaller than radius of the orbit and can be considered negligible.
Answer in units of h
The answer is not 0.3963 h.Tell me why!
Many thanks!
How long it will take an object without initial speed to reach surface of the asteroid from this orbit?The radius of the asteroid is very much smaller than radius of the orbit and can be considered negligible.
Answer in units of h
The answer is not 0.3963 h.Tell me why!
Many thanks!
此高度处的g‘=4π^2 R/T^2
随着高度降低,g'将逐渐增加,因此此运动并非匀变速运动.
需要进行积分运算.
再问： 用积分的话题目条件不够吧？
再答： 够了，定积分，从0到540km，计算式麻烦点，需要按照积分的定义式列式，从x到△x按照匀加速运动计算，来积分。
随着高度降低,g'将逐渐增加,因此此运动并非匀变速运动.
需要进行积分运算.
再问： 用积分的话题目条件不够吧？
再答： 够了，定积分，从0到540km，计算式麻烦点，需要按照积分的定义式列式，从x到△x按照匀加速运动计算，来积分。
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