NEET UG PHYSICS MCQ: MOTION IN PLANE

1 Hard

1 of 1

Application +4 | -1

\vec a

and

\vec b

are two unit vectors such that

\bar a + 2\vec b

and

5\vec a - 4\vec b

are perpendicular to each other then the angle between

\vec a

and

\vec b

View answer and explanation

Correct option: C

60^\circ

Option C (

60^\circ

) is correct because the dot product of perpendicular vectors is zero, leading to an equation that can be solved for the angle between the vectors.

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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)