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===== Galilean Transformations =====

(Lecture: 10 minutes)

    * F=ma
    * Newton's laws valid in inertial frames
    * moving train (constant velocity)

==== Reflections ====

An explicit derivation of the Galilean transformation between (Newtonian)
inertial frames is probably not helpful, although it is worth presenting the
simple derivation that, since two such frames differ by a constant velocity,
all accelerations are the same in either frame.

This lecture works well as a continuation of the wrap-up to the
[[swbq:cmsw:rfswinertial|Inertial Frames]] SWBQ.
The key point is that Newton's laws (as usually formulated) are only valid in
inertial frames.  The next step will be to find a formulation which holds in
rotating frames; whether the result should be referred to as "Newton's laws"
is a separate, and largely philosophical, question.

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