In the figure shown, which statement about the represented vector is correct? 
ARotating it through any angle leaves the vector unchanged
BDisplacing it parallel to itself changes its magnitude
CAnother vector with the same magnitude and direction can replace it
DIts tail and head can be interchanged without changing the vector
Answer & Solution
Correct answer: C. Another vector with the same magnitude and direction can replace it
The notes state that a vector can be replaced by another when its magnitude and direction are the same. A parallel displacement does not change the vector, but rotation through an angle other than $360^\circ$ does. Interchanging tail and head reverses the direction.
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