[" A particle of mass 'm' is moving along a circle of "],[" radius 'r' At some instant,its speed is 'v' and it is "],[" gaining speed at a uniform rate 'a',then,at the "],[" given instant,acceleration of the particle is: "],[" (1) along the radius at "theta=cos^(-1)(ar)/(v^(2))],[" (4) inclined to radius at "theta=tan^(-1)(v^(2))/(" ar ")]