Question

We have $\overrightarrow{F}=4\hat{i}-3\hat{j}$. Another vector that is perpendicular to $\overrightarrow{F}$ is

• A. $4\hat{i}+3\hat{j}$
• B. $6\hat{i}$
• C. $7\hat{k}$
• D. $3\hat{i}-4\hat{j}$

Answer 1

The correct option is C $7\hat{k}$

$\overrightarrow{F}$ lie in the x - y plane, so a vector along z-axis will be perpendicular to $\overrightarrow{F}$.

Hence, $7\hat{k}$ is the vector along z-axis and perpendicular to $\overrightarrow{F}$