At ty = 1.00 s, the acceleration of a particle moving at constant speed in counterclockwise circular motion is aj = (4.00 m/s2 )i + (8.00 m/s3 )j At to = 2.00 s (less than one period later), the acceleration is az = (8.00 m/s2 )i - (4.00 m/s3 )j The period is more than 1.00 s. What is the radius of the circle