A dog running with a constant speed v is chasing a cat that is running with a constant velocity u. During the chase, the dog always heads towards the cat. At an instant, direction of motion of the dog makes angle 9 with that of the cat and the distance between them is r. (A) (B) (C) (D) The magnitude of acceleration of dog at this instant is uv sine vr Radius of curvature of path followed by dog at this instant is- usine The magnitude of acceleration of dog at this instant is uv cos e r Radius of curvature of path followed by dog at this instant ur v cose