Problem D4:
Triplets, each the same mass are spinning around on a massless merry-go-round.
The triplets start out, each at a distance of n1 from the center,
with the initial angular velocity of the merry-go-round being ω0.
Then, they all move inward to a distance of n2 from the center.
If the angular velocity is ω = n3 ω0 when they
are at the distance of n2, what is n3?
Note that n1 and n2 have the same distance units, and
n3 is unitless.
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