A particle A moves along a circle of radius `R=50cm` so that its radius vector r relative to the point O(figure) rotates with the constant angular velocity `omega=0.40rad//s`. Find the modulus of the velocity of the particle, and the modulus and direction of its total acceleration.
A. `v=0.4 m//s, a=0.4 m//s^(2)`
B. `v=0.32 m//s, a=0.32 m//s^(2)`
C. `v=0.32 m//s, a=0.4 m//s^(2)`
D. `v=0.4 m//s, a=0.32 m//s^(2)`