Home JEE Main - Previous Year Papers JEE MAIN 2020 PAPER-4 Position of particle as a function of time i…
JEE Main - Previous Year Papers JEE MAIN 2020 PAPER-4 Single Correct MCQ
Published on: August 13, 2026

Position of particle as a function of time is given as , where is constant. Choose correct statement about and where and are the velocity and acceleration of the particle at time .

A
and are perpendicular to
B
is parallel to and parallel to
C
is perpendicular to and is away from the origin
D
is perpendicular to and is towards the origin

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Verified by Experts
The correct answer is:
D

Since there is negative sign in acceleration, this means that acceleration is in opposite direction of

For velocity direction we can take dot product of and .

which implies that is perpendicular to .

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