Spring-Mass Oscillator

m*x'' = -k*x - c*x' -- Hooke's law with damping, live KE/PE energy bars.

Spring constant k 10.0Mass m 1.00Damping c 0.30Initial displacement x0 1.50

omega0 = sqrt(k/m) = 3.16 rad/s

period = 2*pi/omega0 = 1.99 s

zeta = c/(2*sqrt(mk)) = 0.047 (underdamped)