A rope of negligible mass passes over a pulley of negligible mass attached to the ceiling, as shown above. One end of the rope is held by Student A of mass 70 kg, who is at rest on the floor. The opposite end of the rope is held by Student B of mass 60 kg, who is suspended at rest above the floor. (b) Calculate the magnitude of the force exerted by the floor on Student A. (c) Student B now climbs up the rope at a constant acceleration of 0.25 m/s2 with respect to the floor. Calculate the tension in the rope while Student B is accelerating. (d) As Student B is accelerating, is Student A pulled upward off the floor? Justify your answer. (e) With what minimum acceleration must Student B climb up the rope to lift Student A upward off the floor? i was working on this question for a long time but i kept getting it wrong.