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The cross product $\vec a\times\vec b$ of two parallel non-zero vectors is:
AA scalar equal to $|\vec a||\vec b|$ on chart at all times
BTheir dot product on the school chart at all times here
CThe zero vector, since $\sin 0 = 0$ for parallel vectors
DPerpendicular to both vectors on the school chart here always
Answer & Solution
Correct answer: C. The zero vector, since $\sin 0 = 0$ for parallel vectors
$\vec a\times\vec b = |\vec a||\vec b|\sin\theta\, \hat n$; $\sin 0 = 0$, so result is zero vector.
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