Posted by Nat on Sunday, April 5, 2009 at 4:54am.
the components of a vector V can be written (Vx,Vy,Vz). what are the components and length of a vector which is te sum of the 2 vectors, V1 and V2, whose components are (8,3.7,0) and (3.9,8.1,4.4)?

physicsvectors  drwls, Sunday, April 5, 2009 at 6:53am
Add the corresponding components to get the components of the sum vector.
The length is the square root of the sum of the squared components

physicsvectors  Nat, Sunday, April 5, 2009 at 9:07am
how do i find the angle between the summed vector and the z axis in this reference frame?

physicsvectors  drwls, Sunday, April 5, 2009 at 10:53am
The cosine of that angle is vertical component divided by the vector length.
They don't ask for that angle in your original question
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