Question

what does $5\hat{j}$ signifies

• A. $5$ unit is $x$ direction
• B. $5$ unit is $y$ direction
• C. $5$ unit is $z$ direction
• D. $5$ unit is $x,y$ and $z$ direction

Answer 1

The correct option is B $5$ unit is $y$ direction

As $\hat{j}$ is unit vector in $y$ dirction so $5\hat{j}$ means $5$ unit in $y$ direction.