Resonance occurs<span> when the amplitude of an object's oscillations are increased by the matching vibrations of another object.
Source: </span>Resonance: Definition & Transmission of Waves
ANY closed orbit exists because of the centripetal force of gravity.
Without the force of gravity, the satellite would simply sail away
in a straight line.
The orbit you're describing happens to be a circular orbit, but it
doesn't have to be circular.
Answer:
v = 2 m/s
Explanation:
First, we find the angular velocity of the girl by using the following formula:

Now, for the average velocity of the girl we can use the following formula:

where,
r = radius = 200 m
therefore,
<u>v = 2 m/s</u>