19.8. consider the simple harmonic oscillation where the force constant is 19.6n/m.
x = -(0.100m) cos8.081, and v = (0.808 m/s) sin 8.081, determine: (a) the total energy, (b) the kinetic and
potential energies as a function of time, (c) the velocity when the mass is 0.050 m from equilibrium.
(d) the kinetic and potential energies at half amplitude (x = = a/2).