A particle moves so that its position vector is given by

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Where ω is constant.
Which of the following is true?
(a) Velocity is perpendicular to r and acceleration is directed away from the origin
(b) Velocity and acceleration both are perpendicular to r.
(c) velocity and acceleration both are parallel to r
(d) Velocity is perpendicular to r and acceleration is directed towards the origin

Anurag Mishra Professor Asked on 2nd May 2016 in Physics.
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    Answer: (d) Velocity is perpendicular to r and acceleration is directed towards the origin 

    Anurag Mishra Professor Answered on 6th May 2016.
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