which of the following is true? a. a radial load is applied when the pressure from the load is perpendicular to the axis of the shaft, whereas an axial load is applied when the pressure from the load is parallel to the axis of the shaft. b. an axial load is applied when the pressure from the load is perpendicular to the axis of the shaft, whereas a radial load is applied when the pressure from the load is parallel to the axis of the shaft. c. both radial and axial loads are applied when the pressure from the load is perpendicular to the axis of the shaft. d. both radial and axial loads are applied when the pressure from the load is parallel to the axis of the shaft.