The vector which can give unit vector along x-axis with ${\rm{\vec A}} = 2\hat i - 4\hat j + 7\hat k,\,{\rm{\;\vec B}} = 7\hat i + 2\hat j - 5\hat k$ and ${\rm{\vec C}} = - 4\hat i + 7\hat j + 3\hat k$ is

$ - 5\hat i - 5\hat j + 5\hat k$

NEET UG PHYSICS MCQ: MOTION IN PLANE

1 Medium

1 of 1

Analyzing +4 | -1

The vector which can give unit vector along x-axis with

\mathrm{\vec A} = 2\hat i - 4\hat j + 7\hat k,\,\mathrm{\;\vec B} = 7\hat i + 2\hat j - 5\hat k

and

\mathrm{\vec C} = - 4\hat i + 7\hat j + 3\hat k

View answer and explanation

Correct option: C

- 4\hat i - 5\hat j - 5\hat k

Option C (

- 4\hat i - 5\hat j - 5\hat k

) is correct because the vector sum of A, B, C, and the given vector results in a vector along the x-axis.

Practice All Chapter MCQs →

\mathrm{\vec a}\,and\,\mathrm{\vec b}

\mathrm{\vec a}\,and\,\mathrm{\vec b}

\overrightarrow P \,\,.\,\,\overrightarrow Q = 0\,and\,\overrightarrow P \,\, \times \,\,\overrightarrow Q = 0

\overrightarrow Q \,and\,\overrightarrow R

\vec{A}=3 \hat{i}+4 \hat{j}

\vec{B}=6 \hat{i}+8 \hat{j}

A

B

\overrightarrow{\mathrm{A}}

\overrightarrow{\mathrm{B}}

{\cot ^{ - 1}}\left( 2 \right)