If $\vec{a}=5\hat{i}+\hat{j}+3\hat{k}$ then the sum of projections $\vec{a}$ on x axis, y axis and z axis is :
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 9
Sum of projections
= proj. (x-axis) + proj. (y-axis) + proj. (z-axis)
= 5 + 1 + 3 = 9