Kinematics Question 450
Question: Component of the vector $ \vec{A}=2\hat{i}+3\hat{j} $ along the vector $ \vec{B}=(\hat{i}+\hat{j}) $ it’s
Options:
A) $ \frac{5}{\sqrt{2}} $
B) $ 4\sqrt{2} $
C) $ \frac{\sqrt{2}}{3} $
D) None of these
Correct Answer: A [a] Component of $ \vec{A} $ along $ \vec{B}=A\cos \theta =\frac{\vec{A}.\vec{B}}{B} $ $ =\frac{2+3}{\sqrt{1+1}}=\frac{5}{\sqrt{2}} $
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