The position of a particle is defined by r = {7 (cos 3t) i + 10 (sin 3t) j} m, where t is in seconds and the arguments for the sine and cosine are given in radians. Part A Determine the magnitude of the velocity of the particle when t = 1 s. Express your answer using three significant figures and include the appropriate units. v = Value Submit Request Answer Part B ? Units Determine the magnitude of the acceleration of the particle when t = 1s. Express your answer using three significant figures and include the appropriate units. a = Value Submit Request Answer ? Units