MCQ
A vector $\vec{F}_1$ is along the positive $X$-axis. If its vector product with another vector $\vec{F}_2$ is zero then $\vec{F}_2$ could be
  • A
    $4 \hat{j}$
  • B
    $-(\hat{i}+\hat{j})$
  • C
    $(\hat{j}+\hat{k})$
  • $(-4 \hat{i})$

Answer

Correct option: D.
$(-4 \hat{i})$
(d)

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