Solution: From Figure 3.9 it can be seen that the position of mass m is given by x and the position of the flywheel is given by . These two co-ordinates are related as

                                                                             (a)

Hence the present system is SDOF . The kinetic energy will be there due to the mass of the block m and the polar mass moment of inertia of the flywheel J and it is given as

                                                                              (b)