An electric fan is turned off, and its angular velocity decreases uniformly from 550 rev/min to 170 rev/min in a time interval of length 4.05 s Part A Find the angular acceleration a in revolutions per second per second. View Available Hint(s) a = Submit Part B F ? rev/s Find the number of revolutions made by the fan blades during the time that they are slowing down in Part A. View Available Hint(s) Submit Part C ? rev How many more seconds are required for the fan to come to rest if the angular acceleration remains constant at the value calculated in Part A7 View Available Hint(s)