急谢可以近似认为地球在一个半径为R的圆轨道上绕日公转,取日心参考系为惯性系,地球公转周期即一年=365.2564日,地球

kencyp2022-10-04 11:39:541条回答

急谢
可以近似认为地球在一个半径为R的圆轨道上绕日公转,取日心参考系为惯性系,地球公转周期即一年=365.2564日,地球自转周期为t,地球上的人连续两次看见在天空中同一位置的时间间隔t'为一个太阳日,简称一日,即24小时.假设有某种作用,把地球绕日公转的圆轨道半径改变为R',但未改变地球自转周期.设经过这样改变后,地球公转一个周期即新的一年刚好是360新日,试问1:这新的一日的时间是多少小时?2:这新的一年应该是多少小时,才能使得新的一年刚好是360新日?

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风腥血雨 共回答了11个问题 | 采纳率81.8%
自转不改变的情况下还是24小时,因为它自转不改变,
由于半径变小导致公转周长变小,侧面说明地球的线速度基本没有改变,线速度没有改变一般自转速度也不会改变,因为地球的大小不改变,所以一天还是24小时.
这新一年的太阳就应该是24*300=7200小时.
按理说地球更靠近太阳了之后,由于受太阳的引力影响加大,自转速度应该是更慢才对的.
1年前

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