The force applied by the rope accelerates trinity's mass away from the building, but newton's second law of motion tells us that the same force would have produced on the greater mass of the helicopter

According to Newton's Second Law of Motion, the force is directly proportional to mass and acceleration. However, mass and acceleration are inversely proportional to each other. It is best interpreted by the equation: F = ma. So, for the same amount of force, it would produce less acceleration on the greater mass of the helicopter.

26.4 is about the right time