Lect_07 - Lecture 7 Relative Motion Goals for Lecture 7...

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Unformatted text preview: Lecture 7 Relative Motion Goals for Lecture 7 Goals for Lecture 7 • Define Galilean transformation laws between moving reference frames. • Define inertial reference frames where Newton’s laws live (even though we still don’t know about Newton’s laws…). Upside down Galilean transformations Galilean transformations P We always need to refer positions (and therefore velocities and accelerations) to a frame of reference . = relation between the description of a particle in two frames which are moving with respect to each other. r B,A r P,B y x z B r P,A y x z A P,A P,B B,A r r r = + G G G Galilean transformations Galilean transformations P,A P,B B,A r r r = + G G G P,A P,B B,A d dt v v v = + ↓ G G G P,A P,B B,A d dt a a a = + ↓ G G G Example: Moving Sidewalk Example: Moving Sidewalk Clearly velocity is a reference-frame dependent quantity! bg: background s: moving sidewalk What are some frame independent quantities?...
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Lect_07 - Lecture 7 Relative Motion Goals for Lecture 7...

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