Browse Questions

# Find the projection of $\overrightarrow{i}-\overrightarrow{j}$ on $z$ axis

Toolbox:
• For any two vectors $\overrightarrow a \: and \overrightarrow b$, the projection of $\overrightarrow a \: on \: \overrightarrow b= \large\frac{\overrightarrow a.\overrightarrow b}{|\overrightarrow b|}$
$\overrightarrow a = \overrightarrow i-\overrightarrow j$. Its projection along the $z$ axis is the projection along $\overrightarrow k$
Projection of $\overrightarrow a\: on \: \overrightarrow k = \large\frac{\overrightarrow a.\overrightarrow k}{|\overrightarrow k|}=0$
( Since $\overrightarrow i.\overrightarrow k = \overrightarrow j.\overrightarrow k=0)$