Kinematics Question 422
Question: The component of $ (\hat{i}+\hat{j}) $ along $ (\hat{i}-\hat{j}) $ it’s
Options:
A) 0
B) $ \frac{1}{\sqrt{2}}(\hat{i}-\hat{j}) $
C) $ \frac{1}{\sqrt{2}}(\hat{i}+\hat{j}) $
D) $ \frac{\hat{i}-\hat{j}}{2} $
Correct Answer: A [a] $ (\hat{i}+\hat{j})\cdot (\hat{i}-\hat{j})=0, $ so, they remain at right angles to each other. So component is zero.
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