A question of physics, or is it?

[ssalxpanerai]

The plane will fly due to the wing speed. If the plane and belt have a match speed, the wheels will move but the wing does not move compares to the wind surrounding the wing.

So the plane will never take off.

 

[Novesh]

I am sorry... I don't know how else to word it... going from 60 to 100 in 0 seconds simply means that you are now going 100... if you drive for 1 hour you will then have gone 100 mph...

If you recall you brought up complexities like accelerate and deceleration times etc... the instant accel is thrown in to simplify those out of the way and make it easy math...

I guess u guys aren't following me.

I took a theratical physics class, and we discussed this same type of accel, instant which would not cover distance, that's the angle I was looking at this problem from.

I see what pugs is saying, but I didn't see it that way with the wording.

if its assumed instant then no distance can be covered if there was no distance implied to begin with unless your implying a "lap" is a definitive distance..??

I hope you guys see what I'm talking about I hate to be stumped by these types of probs.

I don't know what you are talking about but I am not sayig it's not valid or anything...

To me instant acceleration simply means you can change speed instantly... you still cover distance at that speed, there is simply no time or distance involved in the change (ie when you see truck commercials that say 0-60 in 8 seconds... this would be 0-60 in 0 seconds)

there you go, if you go zero to sixty in zero seconds are you covering any distance?

 

[Anubis]

Physics Shmisycs,

This is an observer based reality people. What you see around you is just the probabilistic collapsing wavefront of the quantum stream. the real question is: Is the Moon still there if no one is looking?
now go have fun.
:twisted:

 

[t185]

So really....why did the chicken cross the road........

 

[Anubis]

As per Novesh;
Chickens in rest tend to rest, Chickens in motion tend to cross the road.
Happy now?

 

[Klink]

The plane will fly due to the wing speed. If the plane and belt have a match speed, the wheels will move but the wing does not move compares to the wind surrounding the wing.

So the plane will never take off.

maybe the jet engines will fly off..

a plane takes off due tot he lift generated through the air.. as above, if the air does not flow across the wings, well, then, the plane does not fly..

sorta figure: take a jet engine and a fuel tank.. put it on the tarmac.. light it up.. will it fly?

take an airplane without engines, and take it up to 10,000 feet and drop it.. will it sink straight down, like a stone,

because it does not have jet engines?

hmmm

 

[drhydro]

In Klinkish....

(A) sorta figure: take a jet engine and a fuel tank.. put it on the tarmac.. light it up.. will it fly?

(B) take an airplane without engines, and take it up to 10,000 feet and drop it.. will it sink straight down, like a stone, because it does not have jet engines?

To (A)- maybe, if it goes fast enufff....

To (B)- maybe, if it isn't designed so that it glides...

key to both, IMO, is control and speed with respect to the air surrounding. In the original riddle that spawned this fascinating series of posts, relativity rules.... if an observer with an anemometer reading zero does not see the plane moving with respect to him/her, even though there is a mighty churning of wheels and conveyors under the plane, then the plane does not fly- its airspeed indicator reads zero, no movement of air over the wingdings, no lift, no fly.

An airplane which loses power in flight does not tend to fall like a stone, nor does a helicopter (although the latter may be not far from it!)

Been there, done that. Flown airyplanes since the late fifties. A lot does depend on what watch the pilot is wearing....

 

[Devedander]

there you go, if you go zero to sixty in zero seconds are you covering any distance?

It doesn't... the second lap part does...

Instant acceleration in action: just as you cross the finish line of lap 1 you instantly are going 180mph. There is no point at which you are going any speed between 60mph and 180mph. This makes the math much easier than trying to figure out how long it takes to achieve 180mph from 60mph etc etc and factoring it all in.

Acceleration never denotes anything about distance. If you go zero to sixty in 0 seconds you cover no distance during the change, but you do cover distance during the lap you race at 60 mph after you have gone from zero to sixty in 0 seconds.

 

[horologie_unitas]

klink...the jet without engines....let it go up there...it will fall like a stone....
a cessna....no...it will partly glide

 

[horologie_unitas]

but i have a god easy one as well...i was going in a german ICE- Train....at a speed of over 200 mph...
thats 330 km / h ...so...i stand in the cabin...and let a ping-pong ball fall.....does the ball fall straight down.....or in a curve....what about a feather ?
games to play in a high speed train !!

 

[BurgerFlaggen]

The jet will lift off.
The jet engines thrust against the air, not the belt the plane is sitting on.
The aircraft will indeed move forward, in spite of the belt traveling in the opposite direction; it will achieve lift based upon Bernoulli's Principle, as noted by others. Might take a smidge longer due to rolling resistance, but it will get there.

Of course, a VTO like a Harrier would make it all moot anyway

Sorry I arrived late to the party.
Off to bed.

 

[pugwash]

thats 330 km / h ...so...i stand in the cabin...and let a ping-pong ball fall.....does the ball fall straight down.....or in a curve....what about a feather ?

Welcome to relativity. Did you forget we're on a speeding rock spinning around a ball of flame?

 

[piratedzeus]

it depends on the system which you use to describe the ball... you in the cabin.... you next to the cabin at 0mph.... you in space... etc

 

[Klink]

is question like to

what iz heavier

pound of feather or pound of lead..

or maybe even

what is heavier, milk or cream...

lol

think of glide ratio with engines off...

somewhere between lead an feathers

an of course, cream does

float on top of milkk