(b) Consider the mechanical system shown in Figure 2.2. V(t) U Velocity source k m1 m2 F(t) OO b f is force here required to achieve specified V(t) Figure 2.2: Mechanical system (1) Draw the bond graph and assign the causality for this mechanical system. (2) Show that a state space for the system can be found that does not even depend on m1. (3) Show that most system output variables depend statically on the state variables and the inputs F and V, but because of m, this is not true of f (defined above)