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    Engineering Need help in solving SDOF cantilever

    1.) I'd calculate the force needed to deflect the beam by using the method of virtual work for t=0 which is u[L] = FL^3/3EI. From there on I am completely clueless. 2.) Task is to calculate damping, mass and stiffness of the SDOF by using the data sheets which is basically the u''(t) function of...