<prompt> In the following arrangement, if the rest is placed on a cantilever pontic , the cantilever can act as aFirst class leverSecond class leverThird class leverNone of the above  <response>: A cantilever can be described as a rigid beam supported only at one end. When force is directed against the unsupported end of the beam as in this rest placed on a cantilevered pontic, the cantilever can act as a first-class lever. The mechanical advantage in this illustration favors the effort arm. 