NEET UG PHYSICS MCQ: MOTION IN PLANE

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Application +4 | -1

A vector

\mathrm{\vec A}

when added to the vector

\mathrm{\vec B = }3\hat i + 4\hat j

yields a resultant vector that is in the positive y direction and has a magnitude equal to that of

\mathrm{\vec B}

Find the magnitude of

\mathrm{\vec A}

View answer and explanation

Correct option: A

\sqrt {10}

Option A (

\sqrt {10}

) is correct because it is derived from vector addition and the given conditions about the resultant vector.

More Questions from MOTION IN PLANE

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\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)