[填空题]
An object with mass 3.0 kg is attachiqa1d jj f/a.5b5 js39jv(edted to a spring with sprim me59/stzium sg+l +/ng stiffness constant k = 280 N/m and is exe9/tzumselg/ s+ m+5imcuting 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.]