Qualification > Math
additional maths...igcse...o-level....
sameer210394:
--- Quote from: slvri on November 09, 2009, 01:21:16 pm ---these are relative velocity questions. i know theyre hard, theyre real b*tches...........anyways
VP=1000/2=500 kmh-1
VW=150 kmh-1
the direction the plane must be steered in is of VP/W
the relative velocity equation is VP=VP/W+VW
refer to diagram attached
theta is the angle that the plane must be steered on
using the cosine rule
cos45=(5002+1502-Vp/w2)/2(500)(150)
Vp/w=407.96kmh-1
using the sine rule
150/sin theta=407.96/sin45
theta=15.1degrees
bearing is 015.1degrees
sorry for the sh*tty diagram but my drawing sucks in Paint
hope this helped
--- End quote ---
dude i knew the answer,
but appreciated any which ways..,. ;)
Ghost Of Highbury:
abbe dude...i know the answer and triangle law..just wanted to confirm the Vp/w
lol, if u knew the answer y did u ask! :P :P
slvri:
nope.........Vp is the velocity of the plane and its the true or actual speed with which the plane travels........it says that the plane goes north at 500kmh-1 so the true velocity is 500kmh-1
sameer210394:
--- Quote from: A@di on November 09, 2009, 03:15:26 pm ---abbe dude...i know the answer and triangle law..just wanted to confirm the Vp/w
lol, if u knew the answer y did u ask! :P :P
--- End quote ---
i wrote, that i knew the answer (upak dekh). i jus wanted 2 know wat chapter is this frm... :P
~~~~shreyapril~~~~:
ohh..!!
this is from relative velocity and vectors!!!
i thought you wud know this!!
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