A 2500-kg helicopter lifts a 1500-kg crate suspended from its fuselage. (a). Ass

Question

A 2500-kg helicopter lifts a 1500-kg crate suspended from its fuselage. (a). Assume that the crate is suspended using steel cables of negligible mass. If the helicopter is accelerating upward at a rate of 2.0 m/s (and the force that the downward-flowing air exert on the crate is negligible,) what is the magnitude of the force that the helicopter rotors must exert on the surrounding air, and what is the magnitude of the force the cables exert on the point where they are connected to the fuselage? (b) answer the same questions, assuming the crate is suspended using thick chains whose totale mass is 150 kg. (c) What is the difference between the total forces exerted by the top and bottom ends of the chains in the situation described in part (b)?

Explanation / Answer

A) let the blades exert a force of F ; F-(2500+1500)g=(2500+1500)2: F=47240N: B) if chains are there with mass of 150 kg ; F-4150*g=4150*2 ; F=49011.5 N ; c) difference in force=1771.5 N

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