Question

The vector projection of a vector $3\hat{i}+4\hat{k}$ on $y$ - axis is

• A. $5$
• B. $4$
• C. $3$
• D. Zero

Answer 1

The correct option is D Zero

As the coefficient of $\hat{j}$ in the given vector is zero, this vector lies in the $XZ$ plane and therefore, projection of this vector on $y$-axis is zero.