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A helicopter lifts a strecher with a 74 kg accident victim in it out of a...

A helicopter lifts a strecher with a 74 kg accident victim in it out of a canyon by applying a vertical force on the stretcher. The strecher is attached to a guide rope which is 50 metes long and makes a 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? Hint: What is the angle between the force and the displacement? It is not 37 degrees. (b) If the operation takes 10 seconds, what power is delivered by the helicopter in Joules/second? In Horsepower?

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