A helicopter lifts a stretcher with a 74 kg accident victim in it out of a canyon by applying a vertical force on the stretcher. The stretcher is attached to a guide rope which is 50m in long and makes an angle of 37 degrees with respect to the horizontal.
A. what is the minimum amount of work that the helicopter needs to do to lift the injured person and stretcher to its cockpit.
B. If the operation takes 10 seconds, what power is deliever by the helicopter in J/sec? In horsepower?