# A particle moves so that its position vector is given by

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

**Answer: (d) Velocity is perpendicular to r and acceleration is directed towards the origin **