A mass of 3 kg is attached to a spring whose constant is 04.03 N
/ m. The medium offers a damping force numerically equal to 4 times
the instantaneous velocity.
The mass is initially released from a point 0.2 m below the
equilibrium position at an upward velocity of 0.266667 m / s.
Determine the time in which the mass crosses the equilibrium
position.