Do the force analysis for the double-rocker mechanism described in exercise 3in Chapter 2. Assume that a constant horizontal force, encountered only when the tracing point moves from left to right, is given, and also that the coupler
rotates with a constant angular velocity. Neglect inertial forces associated with links and plot the external moment applied to the arm 1 needed to rotate the coupler as a function of the coupler angle of rotation.