A damped spring-mass system is subjected to a force F(t) = 10 cos(3 t) N. The system has the following valu mass m-100+nı kg (where ni is the last digit of your ID number), stiffness k = 900+n N/m (where n2 is the summation of the last two digits of your ID number). Note that, to obtain the damping ratio from the bode plot you can use the amplitude ratio as 0.8 and the frequency ratio as 1.2. Find the following

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Strain energy

The term strain indicates the variation in an object's length, area, and volume when the object is subjected to an external force. The external force may be of normal, shear, moment, torque, etc. The strain in an object depends on the types of external force and cross-section of the object. Mathematically, the evaluation of strain can be obtained with the help of elastic constants.