Recent content by ganeshrk

damping ratio = c/(2sqrt(mk)) = 2/(2sqrt(28x13)) = 0.0786 | 7.8% critical damping damped radian freq = unadamped radian freq x sqrt(1 - damping ratio^2) = 0.679 The amplitude of motion of the mass is logarithmically decreasing and it is a function of the damping ratio.

Your mass is 28; spring constant or stiffness is 13. Radian natural frequency is sqrt(k/m) = 0.681 radians/sec or 0.1084 Hertz (cycles/sec).