Airplane on a Conveyor Belt - Complete Physics, pt. 3

Drostie tackles the complete physical problem of the airplane on a conveyor belt -- in a modestly boring lo-fi lecture where he says "um" a lot. Lots of typical arguments, including Hyneman's, given in Mythbusters, are seen to be wrong

Category:

Education

Tags:

• mythbusters
• airplane
• plane
• conveyor
• belt
• treadmill
• science
• physics

[destin325]

@itbeshowinlikeamotha

exactly and thanks for actually seeing why this is just too simple yet people blow up as if it deserves some sort of formal debate on physics just to determine the answer.

if a plane has NO wings and it goes 40 mph will it take off? no!

so why would a plane with wings NOT going 40mph take off?

someone just needs to build a giant treadmill in a hangar to finally put this one to bed.

[itbeshowinlikeamotha]

If the wind speed is 0 over the wings, the plane will not take off. You guys are trying to damn hard to figure this out.

[boredman443]

These are ridiculous. The parameters of the myth are a plane and a belt going at a relative speed of zero where the relativity is the relation between the two. Wind is zero and really everything relevent is zero. Even if the belt and the plane's speed were plus and minus 12,000,000,007mph the plane would not recieve any lift at all. The question is not how to stop a plane but how to start it. If we wanted to stop it we would place a giant fan there to reverse the air flow causing it to crash.

[tymes10]

I accidently posted my unfinished response but as I said and as the question said u=v and w=0... you can't argue u!=-w+v or that infinite is not equal to infinite+w when w=0.

No mater anything by the question and by definition u=v and w=0.

[tymes10]

At 2:09... how does it stop an airplane? how does it get to this theoretic idea that u=-w... the question is says w=0 and magically by the question u=v and w=0.

At 3:29... infinity plus 0 = infinity. x = x + 0

then later you get to salt shaker... we need to discuss LIFT not just anything or cars or cards... ergh.. you have entirely left the deep end... no point discussing nothing. So lost.

[tymes10]

2:42 "if your motion relative to the ground isn't zero"... but the question says it is zero.

3:14 "for u=-w..." but the question says w=0

#1, this is magic and #2, this

at 4:11 race condition... no race condition... if airflow pushed over wings is enough to compensate for normal forward momentum.