Researchers at Case Western Reserve University (A-2) wanted to develop and implement a transducer, manageable in a clinical setting, for quantifying isometric moments produced at the elbow joint by individuals with tetraplegia (paralysis or paresis of all four limbs). The apparatus, called an elbow moment transducer (EMT), measures the force the elbow can exert when flexing. The output variable is voltage. The machine was tested at four different elbow extension angles, 30, 60, 90, and 120 degrees, on a mock elbow consisting of two hinged aluminum beams. The data are shown in the following table.