Question

3. Can the magnitude of the resultant of two vectors of equal
magnitude be equal to the magnitude of each vector? Explain.
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Answer 1

Answer:

If you add two vectors with equal magnitude, and the magnitude of the resultant vector is equal to the magnitude of both vectors, then the three vectors obviously form an equilateral triangle. As @almagest said, this means that the difference between the angles of the two vectors is 120 degrees.