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xChee
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Homework Statement
An airplane travels N40∘E at an airspeed of 1000km/h. Measurement on the ground shows that the plane is traveling N45∘E at a speed of 1050 km/h. Calculate the velocity of the wind.
Homework Equations
Vg = Va + Vw
The Attempt at a Solution
so i know we're suppose to use the formula Vg = Va + Vw
we know Vg is 1050km/h N45∘E
and Va is 1000km/h N40∘E
we don't know Vw, so we subtract it to the other side of the equation and we have a subtraction of vectors
I drew my vector diagram, and applied to cos law to get the veloctiy of the wind,
a= sqrt[1050^2 + 1000^2 -2(1000)(1050)cos∘]
and got 102.4 km/h as my wind velocity,
can someone confirm if I'm right? :s