a 50kg, 10m long beam is accelerating upward somewhere near the surface of the earth the beam is held up by two identical rop0es one rope is 0.7m from the left end, and the other is 8.5m from the left end the tension in the left rope is 1438n the tension in the right rope is 2476n a 100 kg person is standing slightly to the right of the center of the beam. what is the mass of the beam