• RunawayFixer@lemmy.world
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        18 小时前

        Both. The first c when the heli is flying at a constant speed. The 2nd one when it’s accelerating.

        Edit: problem description said constant speed, so that means the first one.

      • Sam_Bass@lemmy.world
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        17 小时前

        C(2) since it is stated that the cable of uniform construction. unfortunately, i have to assume forward motion of the helicopter and that it is not in a vacuum

        • LaLuzDelSol@lemmy.world
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          18 小时前

          That’s a fair point but its also unclear how that would actually affect the rope. The rotor blades spin faster on the outside of their sweep, so they are driving the air downwards more powerfully there, although the rope is farther below the blades.