nI understand you are not interested in the seesaw, but it is required to get a proper mechanism of the two pads. In Mechanical, under Geometry, select the seesaw body and in the Details window, set the Stiffness Behavior to Rigid. This allows the seesaw to be present but requires almost no nodes and elements to provide the proper DOF to the mechanism. Now you can create three Revolute Joints. One on each pad at the pivot holes, and one Revolute joint Body-Ground to allow the seesaw to pivot at the center. n