[填空题]
An object with mass 3.0 kg is attached to a spring wis)q2zz.3 qrqffb thc /g:p,o 0th spring 4d)k2zs et4 hhstiffness constant k = 280 N/m and is executing simple harmonic motion. When the object ish4etkz4 2)hds 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.]