2A) A towplane with a mass of 2000.0kg is pulling two gliders, each with a mass of 800.0 kg. Each glider is attached to a rope behind the towplane at the same altitude, but 15.0 off the path of the towplane. Each glider experiences a drag of 300.0 N from air resistance, and all three are accelerating down the runway for takeoff at 1.60m/s?. Detemine the force applied by the propeller on the towplane.