A 6-kg mass is attached to a spring whose stiffness constant is 150 N/m. The damping is negligible. The mass is displaced through a distance of 2m to the left of the equilibrium position and given a...

this is diffrential equation course .

Extracted text: A 6-kg mass is attached to a spring whose stiffness constant is 150 N/m. The damping is negligible. The mass is displaced through a distance of 2m to the left of the equilibrium position and given a velocity of m/s to the right. The amplitude, natural frequency of the motion and the time when the mass return to its equilibrium position for the first time are given by Select one: V401 cycles/sec and 0.93s 10 V401 cycles/sec and 0.3s 10 V401 10 cycles/sec and 0.3s V401 10 cycles/sec and 0.93s