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Rotation
From the previous pages we learned that the position vector
r
may be given by
r
(
t
) =
(
x(
t
)
y(
t
)
)
=
(
R cos(φ(
t
))
R sin(φ(
t
))
)
=
(
R cos(ω
t
)
R sin(ω
t
)
)
where
R
represents the radius of the circle which is described by the particle and
φ(
t
)=ω
t
the phase of its position vector.
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