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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 Newtons laws live (even though we still dont know about Newtons 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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