本题目来源于试卷: gc physics textbook chapter 5 problems，类别为 通用国际物理
[问答题]
What keeps a satellite up in its orbit around theEarth?
参考答案: A satellite
remains in orbit due to the combination of gravitational force on the satellite
directed towards the center of the orbit and the tangential speed of the
satellite. First, the proper tangential
speed had to be established by some other force than the gravitational
force. Then, if the satellite has the
proper combination of speed and radius such that the force required for
circular motion is equal to the force of gravity on the satellite, then the
satellite will maintain circular motion.
本题详细解析:
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