Resultant velocity of a plane and a vector addition diagram

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The discussion focuses on calculating the resultant velocity of an airplane flying at 300 km/hr with a heading of 35 degrees south of west, affected by a 78 km/hr wind from 55 degrees south of east. Participants suggest using trigonometry to break down the vectors into perpendicular components for accurate addition. A vector diagram can also be drawn, though it may yield less precise results. The second question involves finding the resultant force from three concurrent forces, with similar advice given for using components. The conversation highlights the need for clarity in applying vector addition techniques.
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--An airplane flies at 300 km/hr with a heading of 35* south of west, as a 78 km/hr wind blows in the direction of 55* south of east. The resultant velocity of the plane is...

--A force of 85 N S50*E, a force of 50 N N45*E, and a force of 70 N N30*W act concurrently on an object. Draw a vector diagram and find the resultant force.


I've tried to do these, I was absent from school a few days and missed instruction on how to work them out..I'd appreciate any help :smile:
 
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If you can use trig to separate the vectors into perpendicular components (say a northward and a westward component) then you can do componentwise addition.

You could also use a protractor and a ruler, but it's harder to get precise answers that way.
 
ok I'm still confused...i'm assuming that was for the 2nd question, does anyone know how to do the first?
 

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