A block of mass 2 kg is pulled up on a smooth incline of angle 30° with the horizontal. If the block moves with an acceleration of 2 m/s2 , then the average power delivered 4 seconds after the motion starts, will be
(A) 110.4 watt
(B) 220.8 watt
(C) 55.2 watt
(D) More than one of the above
(E) None of the above