a spring is initally hung vertically and stretches down 0.150 m when a 0.300 kg mass is gently suspended from it. the spring is then set horizontally with the 0.300-kg mass resting on a frictionless table. the mass is pulled so the spring is stretched 0.100 m from the equilibrium point, and released from rest. determine: a) spring constant k of the spring. b) the amplitude of the oscillation a. c) the total energy of the spring-mass system. d) the magnitude of the maximum velocity vmax. e) the magnitude of the velocity v when the mass is 0.050 m from equilibrium. f) the magnitude of the maximum acceleration amax of the mass.