[填空题]
A 0.60-kg mass at the end of a spring vibrctrp lew /a3q/sk+7n 5t)ot- qates 3.0 times per second with +gj)jgx h,p67s znfd4an amplitude of 0.13 m. Determin npx7+j4gh g6djf z),se
(a) the velocity when it passes the equilibrium point,$\approx$ m/s(round to one decimal place)
(b) the velocity when it is 0.10 m from equilibrium, $\approx$ ± m/s(round to one decimal place)
(c) the total energy of the system,$\approx$ J(round to one decimal place)
(d) the equation describing the motion of the mass, assuming that x was a maximum at x = (0.13π)cos( πt)