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A particle is moving in a circle of radi...

A particle is moving in a circle of radius `r` with speed `v` as shown in the figure. The magnitude of change in velocity in moving from `P` to `Q` is

A

The resultant force on the particle must be towards the centre.

B

The resultant force may be towards the centre.

C

The direction of the angular acceleration and the angular velocity must be the same.

D

The cross product of the tangential acceleration and the angular velocity will be zero.

Text Solution

Verified by Experts

The correct Answer is:
B
In uniform circular motion force is towards center but in nonuniform circular motion net force is not towards centre.
In retardation angular acceleration and angular velocity are opposite to each other.
Tangential acceleration and angular velocity are perpendicular to each other so cross will not be zero.
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