A.Calculate the angular velocity and angular acceleration of a 2kg mass rotating in a horizontal circle of 2m radius if one revolution takes 4 seconds. B. An object rotates in a 3m diameter cicle with angular velocity of 3 rad/s. Caculate the period and the frequency of rotation for the object. C. Calculate the centripetal force required to rotate a 3kg mass in a 6m diameter circle at one 60 revolutions per minute.