A body oscillates with simple harmonic motion according to x = (8.5 m) cos[(5.0pi rad/s)t + pi/3 rad]. At t = 4.25 s What is the displacement? 2.200 m What is the velocity? 1.290×102 m/s What is the acceleration? What is the phase of the motion? What is the frequency? 2.500 Hz What is the period of the motion?