An object with mass 4.5 kg is attached to a spring with spring stiffness constant k = 250 N/m and is executing simple harmonic motion. When the object is 0.020 m from its equilibrium position, it is moving with a speed of 0.55 m/s.
(a) Calculate the amplitude of the motion.
______ m
(b) Calculate the maximum velocity attained by the object. [Hint: Use conservation of energy.]
_______ m/s