At t1 = 1.00 s, the acceleration of a particle moving at constant speed in counterclockwise circular motion is A1=(3.00m/s^2)i +(5.00m/s^2)j At t2 = 3.00 s (less than one period later), the acceleration is A2=(5.00m/s^2)i - (3.00m/s^2) The period is more than 2.00 s. What is the radius of the circle? number and units?