# Subtracting Vectors Lengths

"The figure below (please see attached Word file) shows three vectors of lengths

A = 67.8, B = 39.5, and C = 47.0.

The angles are theta(a) = 28.8Â°

and theta(b) = 54.5Â°, and C points along

the negative y-axis. Determine the length of the vector A - C."

The book indicates that the equation for subtraction of vectors is simply "vector 2 - vector 1." But when I try that for this problem, I don't obtain the right answer (it's neither 20.8, nor -20.8). Can you show me how to do this problem?

Thank you!

Â© BrainMass Inc. brainmass.com March 4, 2021, 5:44 pm ad1c9bdddfhttps://brainmass.com/physics/scalar-and-vector-operations/subtracting-vectors-lengths-8784

#### Solution Preview

see attached file

The figure below shows three vectors of lengths

A = 67.8, B = 39.5, and C = 47.0.

The angles are thetaa = ...

#### Solution Summary

The expert determines the length if the vectors. Negative y-axis on graphs are found.

$2.19