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F up - weight down = m a up
F - 4280*9.81 = 4280 *2.030
F - 4280*9.81 = 4280 *2.030
In this scenario, the force we want to find is the vertical force exerted on the blades, the mass of the helicopter is given as 4280 kg, and the vertically upward acceleration is given as 2.030 m/s^2.
Using Newton's second law, we can calculate the force:
Force = Mass × Acceleration
Force = 4280 kg × 2.030 m/s^2
Force = 8688.4 N
Therefore, the vertical force exerted on the rotating blades of the helicopter by the air under the blades is 8688.4 Newtons.