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re: Can you solve this 2014 US Physics team qualifying exam helicopter rope problem?
Posted on 10/29/21 at 6:25 am to euphemus
Posted on 10/29/21 at 6:25 am to euphemus
C. Downward force on the rope is greatest at the top since the entirety of the rope below it is pulling it down. The wind resistance is the same throughout. However, there is less downward force on the bottom of the rope which allows wind resistance to overcome it and displace it back.
Also, as the helicopter moves forward there will be an upward pull initially due to overcoming its inertia.
Also, as the helicopter moves forward there will be an upward pull initially due to overcoming its inertia.
0
Posted on 10/29/21 at 6:26 am to euphemus
I'd say B or C but I'm no physicist.
Posted on 10/29/21 at 6:33 am to euphemus
C
Posted on 10/29/21 at 6:35 am to euphemus
C. Wind from the rotors pushed the cable down initially then air friction pushes the cable back as it gets further away from the rotors.
Posted on 10/29/21 at 6:46 am to euphemus
I guessed B
Posted on 10/29/21 at 6:50 am to euphemus
How much does the rope weigh??
Posted on 10/29/21 at 6:53 am to eiasjsf
quote:
My initial answer was B but then I thought that seemed too easy for the test so I changed it to C figuring there was some rotor wash frickery. One of these days I'll learn to stop second guessing myself.
I did exactly the same thing.
Posted on 10/29/21 at 7:13 am to euphemus
That 
has a huge dick
has a huge dick
Posted on 10/29/21 at 7:31 am to euphemus
The answer is B. Break the rope into tiny sections, and thinking about the forces acting on each section.
Posted on 10/29/21 at 7:55 am to euphemus
I’m saying b.
Posted on 10/29/21 at 7:57 am to euphemus
Without watching I’d say D
Posted on 10/29/21 at 8:04 am to BPTiger
quote:Pretty sure that isn’t possible, since they’d need the air resistance on the rotors for lift
If the helicopter could fly in a vacuum.
Posted on 10/29/21 at 8:08 am to BRgetthenet
quote:
The angle of the dangle is inversely disproportionate to the heat of the meat.
Or, it is equally proportionate to the mass of the arse.
*Hat tip to uncle Bumblefrick
Posted on 10/29/21 at 8:10 am to euphemus
quote:
How does a uniform cable beneath a helicopter hang?
Posted on 10/29/21 at 8:13 am to euphemus
The doctor is the boy’s mom
Posted on 10/29/21 at 8:17 am to euphemus
Friction from wind is non negligible. The weight below each point creates a torque counter balancing the wind friction. Less mass means less torque and more movement. I’d guess C.
ME with 10 years in rod lift designing pumps placed 2 miles under ground.
ME with 10 years in rod lift designing pumps placed 2 miles under ground.
Posted on 10/29/21 at 8:32 am to euphemus
lol the guy in the video says "lets go" and hops into an empty helicopter. then it cuts to a pilot and another guy in there.
Posted on 10/29/21 at 8:35 am to euphemus
My guess is B.
Posted on 10/29/21 at 8:41 am to euphemus
I will go with whatever answer the black trans lesbian says. It has to be right because of equity.
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