7.) A 5-kg mass is attached to a spring whose stiffness constant is 80 N/m. The damping is negligible. The mass is displaced through a distance of 0.5 m to left of the equilibrium position and given a velocity of 2 m/s to the right. Find the equation of motion of the mass together with the amplitude, period and natural frequency.

7.) A 5-kg mass is attached to a spring whose stiffness constant is 80 N/m. The damping is negligible. The mass is displaced through a distance of 0.5 m to left of the equilibrium position and given a velocity of 2 m/s to the right. Find the equation of motion of the mass together with the amplitude, period and natural frequency.