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Physics 9 Online
OpenStudy (anonymous):

Starting from a pillar, you run a distance 200 m {\rm m} east (the + + x-direction) at an average speed of 5.0 m/s {\rm m/s}, and then run a distance 280 m {\rm m} west at an average speed of 4.0 m/s {\rm m/s} to a post

OpenStudy (anonymous):

incomplete question

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