A floodlight with a mass of 23 kg is used to illuminate the parking lot in front of a library. the floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole, as shown. a cable that makes an angel of 19 degrees with the beam is attached to the pole to help support the floodlight. assume the mass of the beam is neglible when compared with the mass of the floodlight. find the horizontal force exerted on the beam by the pole. answer in units of N.