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A satellite will travel indefinitely in a circular orbit
around the earth if the normal component of its
acceleration is equal to g (R/r)2 where g=9.81
m/s2,R = radius of the earth = 6370 km. and r =
distance from the center of the earth to the
satellite. Assuming that the orbit of the moon is
a circle of radius 384 × 103 km. determine the
speed of the moon relative to the earth.

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