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