Kinematics Question 284
Question: A vector $ \overrightarrow{A} $ points vertically upward and $ \overrightarrow{B} $ points towards north. The vector product $ \overrightarrow{A}\times \overrightarrow{B} $ it’s [UPSEAT 2000]
Options:
A) Zero
B) Along west
C) Along east
D) Vertically downward
Show Answer
Answer:
Correct Answer: B
Solution:
Direction of vector a is along z-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}) $
The direction is $ \vec{A}\times \vec{B} $ it’s along west.
BETA
