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Approximately one billion years ago, the moon orbited the Earth much closer that it does today. The radius of the orbit was only 24 400 km. The orbital period was only 23 400s. Today the average radius is 385,000km; and the present period is 2.36x106s. Assuming that the orbit of the moon is circular, calculate the ratio of the speed of the moon in its ancient orbit to the speed it has today.
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We consider the orbit of the Moon around the Earth to be circular.
Perimeter of the orbit is given as 2 π R, where R is the radius of the ...
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