11. (a) A spring is stretched 10 cm by a force of 3 newtons (N). A mass of 2 kg is hung from the spring and isalso attached to a viscous damper that exerts a force of 3 N when the velocity of the mass is 5 m/s. If the mass ispulled down 5 cm below its equilibrium position and given an initial downward velocity of 10 cm/s, determine itsposition y at any time t. Find the quasi-frequency and the ratio of to the natural frequency of the correspondingundamped motion.(b) Draw a phase portrait of the equivalent dynamical system that includes the trajectory corresponding to theinitial value problem in part (a).

Given: The spring stretched by a force F = 3 N is y = 10 cm The mass attached to the spring is m = 2…

Answered: 11. (a) A spring is stretched 10 cm by…

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