14. a disk is free to rotate about an axis perpendicular to the disk through its center. If the disk starts from rest and accelerates uniformly at the rate of 3 radians /s2 for 4 s , its angular displacement during this time is
(A) 6 radians
(B) 12 radians
(C) 18 radians
(D) 24 radians
(E) 48 radians
(A) 6 radians
(B) 12 radians
(C) 18 radians
(D) 24 radians
(E) 48 radians