To compensate for a distinct lack of personality, Herbert relies on the Grand Entrance technique when he attends parties. His latest plan for appearing at a pool party is to arrive by helicopter and then slide down a nylon rope as the helicopter hovers above poolside. However, as the helicopter approaches its destination, the pilot tells Herbert that the rope will break if the tension exceeds 300 N. Herbert, whose mass is 61.2 kg, realizes that the rope won't hold him unless he slides down with an appropriate acceleration. What must his acceleration be if the rope is not to break and ruin the whole effect?