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Unformatted text preview: velocity in vector notaOon using subscripts required by Galilean velocity formula. Deﬁne East as +x direcOon, so during ﬁrst leg of trip vjw = +400 i and during second leg of trip ﬂying west, vjw =
400 i . Let vwg = +vw i for both legs Determine what is wanted! Hint, the kinemaOc equaOon that describes each leg of the trip that is valid for constant velocity is x
xo= vt. This equaOon is valid if the velocity vector and displacement vectors are with respect to the same frame. In this case, the displacement is with respect to the ground, so the required velocity is with respect to the ground, or vjg! Use Galilean formula to write vjg in terms of velocity that is given and velocity that is wanted. Quiz Week 6
Problem 2
Soln 1. Since this problem involves two legs, you need two kinemaOc equaOons. The hint tells you that you need the velocity of the jet with respect to the ground for each leg. You get this from Galileo s equaOon. leg 1: vjg=vjw+vwg = +400 i +vw i =(400+vw)i leg 2: vjg=vjw+vwg =
400 i +vw i = (
400+vw)i •
Now you can use kine...
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This document was uploaded on 02/14/2014 for the course P 2 at UC Irvine.
 Fall '11
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