Kinematics Question 295
Question: Find the torque of a force $ \overrightarrow{F}=-3\hat{i}+\hat{j}+5\hat{k} $ acting at the point $ \overrightarrow{r}=7\hat{i}+3\hat{j}+\hat{k} $ [CPMT 1997; CBSE PMT 1997; CET 1998; DPMT 2004]
Options:
A) $ A\times B $
B) A - B
C) 3A - 3B
D) All of these
Correct Answer: A $ \vec{A}\times \vec{B} $ it’s a vector perpendicular to plane $ \vec{A}+\vec{B} $ and hence perpendicular to $ \vec{A}+\vec{B} $ .
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Answer:
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