[填空题]
An object with mass :qnp:j *tz:mz3+-k cr757j-bgnwc iwuc9ii7ci c* 2cz.0 kg is attached to a spring with spring stiffness constant k = 280 N/m r* nkigcc5w cw+79c zicc7i7 jb-2 -uiand 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.$\approx$ m/s (round to two decimal place)[Hint: Use conservation of energy.]