(i) Write down the wave equation and find the general solution for longitudinal vibration of a...

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Mechanical Engineering

(i) Write down the wave equation and find the general solutionfor longitudinal vibration of a beam using the method of separationof variable separation.

(ii) Find three lowest natural frequencies of longitudinalvibration of 1.5m beam with free-free boundary conditions at theends. The modules of elasticity is 200e^9 N/m and density 7500kg/m3.

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