Question

Projection of $\overrightarrow{A}=\hat{i}-\hat{j}$ along $\overrightarrow{B}=\hat{k}$ is

• A. $-2$
• B. $-1$
• C. $1$
• D. $0$

Answer 1

The correct option is D $0$

We know that the preojection of $\overrightarrow{A}\text{along}\overrightarrow{B}$ is given as
$\frac{\overrightarrow{A}\cdot \overrightarrow{B}}{|\overrightarrow{B}|}$
$\Rightarrow \frac{(\hat{i}-\hat{j}).\left(\hat{k}\right)}{\sqrt{1^2}}=0$