A point p moves in counter – clockwise direction on a circular path as shown in the figure . The movement of ‘p’ is such that it sweeps out in the figure . The movement of ‘p’ is such that it sweeps out a length s=t^3+5 , where s is in metres and t is in seconds . The radius of the path is 20m . The acceleration of ‘P’ when t=2s is nearly .