MCQ
A vector $\overrightarrow A $ points vertically upward and $\overrightarrow B $points towards north. The vector product $\overrightarrow A \times \overrightarrow B $ is
- AZero
- ✓Along west
- CAlong east
- DVertically downward
✓
Answer
Correct option: B.
Along west
b
(b) Direction of vector $A$ is along $Z-a$axis $⇒$ $\vec A = a\hat k$
(b) Direction of vector $A$ is along $Z-a$axis $⇒$ $\vec A = a\hat k$
Direction of vector $B$ is towards north $⇒$ $\vec B = b\hat j$
Now $\vec A \times \vec B = a\hat k \times b\hat j = ab( - \hat j)$
$\therefore$ The direction is $\vec A \times \vec B$ is along west.
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