13. A 0.5kg mass is vibrating in a system in which the restoring constant is 100N/m; the
amplitude of vibration is 0.20m. Find (a) the energy of the system (b) the maximum
el kinetic energy and maximum velocity (c) the potential energy PE and kinetic energy
KE when x = 0.10m (d) the maximum acceleration (e) the equation of motion if x₂ =
A and t = 0