Chapter 5 for Dynamics, Noise and Vibration module (code UFMEAW-20-3) at UWE Bristol.Chapter 5 is entitled The Basics — Multiple Degrees of Freedom. This chapter (and this video) reviews the basic approach to solve 2 and in some case 3 degree of freedom problems, i.e. finding the equation of motion, finding natural frequencies and mode shapes. This video covers the process of 2 degree of freedom problems. Also discussed is the general solution, semi-definite (or degenerate) systems and an example.