A helicopter (see gure below) is moving horizontally to the right at a constant velocity v. The mass of the helicopter is 5580 kg. The lift force L generated by the rotating blade makes an angle of 21.0 with respect to the vertical. 21.0 (a) (6 marks) What is the magnitude of the lift force, L? (b) (3 marks) Determine the magnitude of the force due to the air resistance R that opposes the motion. (0) (3 marks) The angle of the rotor blades is changed such that the lift force L points vertically up. Ignoring air resistance, what is the vertical acceleration of the helicopter? (d) (3 marks) After accelerating upwards this way for 10 seconds, what is the change in height of the helicopter? (e) (3 marks) What is the work done by the lift force over this time? (t) (2 marks) Is the lift force conservative? Explain your answer in one or two sentences