Q: If a particle is moving on a circular path with increasing speed, then which of the following options are correct?
(a) Acceleration and velocity never be perpendicular to each other
(b) Acceleration is always directed towards centre
(c) Angular acceleration and angular velocity are along the axis of rotation in the same direction
(d) Tangential acceleration and angular acceleration are always perpendicular to each other.
Ans: (a) , (c) , (d)