(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

If vector a is added to vector b = 7.4i + 7.7j, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of vector b. What is the magnitude of vector a?

2. Relevant equations

3. The attempt at a solution

(Is the vector in the positive direction of the y-axis same positive direction of x-axis?

cosθ=u.v/||u|| ||v||

||ab||=5=||b||.

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# Homework Help: What does it mean vector in the positive dirction of the y-axis.

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