Does anyone know how to solve for problems dealing with air resistance? For example: "The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 59500 N. The lift force L generated by the rotating blade makes an angle of 21.0° with respect to the vertical. 1) What is the magnitude of the lift force? 2) Determine the magnitude of the air resistance R that opposes the motion."