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Problem 51.
(Inquiry into Physics-5th ed.,Ostdiek,Bord) On a day the wind is blowing toward the south at 3m/s, a runner jogs west at 4m/s. What is the velocity of the air relative to the runner?
Solution:
By definition the relative velocity is the vector difference of the velocity of the air minus velocity of the runner (see figure).
From the triangle we can find the magnitude of relative velocity:
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