What if the car is going 70mph in REVERSE....eh eh ehhh?
What if the car is going 70mph in REVERSE....eh eh ehhh?
Threads like these are the reason I can't stay away from letsrun.
Thank you all for making my afternoon enjoyable!
Oh,I just farted too.
Inevitably no, but it may come close. It's dependent on how high it is. It's a boundary layer question.
Aks:
Neil Armstrong
MS Aerospace Engineering
University of Football at South Central Los Angeles
the 1st man on the moon
Inverse wrote:
If this was true, wouldn't the taillights of the same car be invisible as the light emitted would be moving at the speed of light minus 70mph?
Only if you closed your eyes.
No, since it is hovering over the same spot and both are moving fast (flying against the earth's rotation significantly faster than any helicopter has ever flown would be necessary to "hover in place" relative to some non earthly spot), but think about this: if it hovered in place over the same spot on earth for one year, it would circumnavigate the Sun!
What if a helicopter took off from a treadmill with Alan Webb flying it during at time when global warming was occuring
Newton's 3rd Law says the chopper goes with the wind if it hovers without any horizontal forces.
"A hovering helicopter is doing so by staying above a fixed point on the ground."
Copied for clarity. Thread win.
Hovering isn't hovering. Pretend I'm on a fixed platform in outerspace and I am watching the earth spin. A hovering helicopter will appear to move from my vantage point even thought it's hovering. So from the pilot's vantage point the helicopter is NOT moving.
NOW....let's say I'm on this platform in outerspace looking at a planet 1 million light years away. I have a "realy strong telescope" and can see an alien in his helicopter also "hovering" but he's moving from my vantage point as well...BUT since he's 1 million light years away this movement actually already happened from HIS vantage point.
Maybe HE'S the captain in the earth helicopter as well....MUAHAHAHAHAHA BRAIN CRAMP!!!!!!!
Alan
Alan
D Rodman wrote:
What if a helicopter took off from a treadmill with Alan Webb flying it during at time when global warming was occuring
Jordan Hasay could do it.
I don't know the answer to the original question, but what I DO KNOW, is that Brett Larner would feel threatened and scared of the helicopter, blame Jason Mayeroff for the "threat" posed by said helicopter, and immediately contact Weldon Johnson for assistance.
Instead of standing still and going into the future, can the chopper fly backwards, counteract time and replace ill-fated flight returning SRV to us?
If it hovered in place relative to the absolute center of the universe, no.
Imagine I'm in space standing on a platform. I start to piss on Earth. And that's where monsoons come from.
No Way wrote:
To answer your question: could a helicopter do this? Sure. Unfortunately, its not as simple as climbing to a certain altitude and putting it in hover mode. A bunch of differenct forces will be acting on it that the pilot will have to correct for.
It is true that the act of 'hovering' requires active adjustment of the controls in order to stay in place and this is true regardless of what we might define "in place" to mean.
However, before we consider if is possible to circumnavigate the globe in 24 hours, we need to remember that the circumference of the earth is over 40,000 km. This means that the helicopter would need to travel relative to the earth's atmosphere at a speed of more than 1600 km/h and significantly greater than the speed of sound.
Supersonic speed of even the tip of the helicopter blade would result in the destruction of the blade and the helicopter, at least for all known helicopter technologies available in the foreseeable future.
So the answer is simple, no helicopter could circumnavigate the globe in 24 hours.
Festizio wrote:
not only would you circumnavigate the globe, you would also end up in yesterday, which means you can go back in time and not start this thread
I can't wait that long though. I think someone should delete it.
Airspeed.
Even if there was a slight wind effect, which I guess there probably is, hovering by definition means that you're staying in one place. If you didn't adjust for wind then you might eventually make it around the world.
Imagine jumping while you're running on a treadmill - you don't come down in a different spot.
To clarify, the answer to my original question is a big fat no. I kept it vague on purpose and the thread is all I dreamed of and more. Thank you letsrunners.
Say you landed on a planet that had no atmosphere and that after standing on the ground for a while, you were able to pull out your anti-gravity device that allowed you to hover stationary 10 feet above the ground. Your lateral momentum would keep you there above the same spot on the ground. However, if you began moving yourself around relative to where you were, your path would always be deflected if you moved up or down in latitude. For example, if you moved towards the equator, your path would be systematically deflected because the rotational velocity of the earth at the equator is greater than the rotational speed at all points north or south. If you tried to head towards the pole, your path would also be deflected continuously and so you would have to continuously slow your horizontal velocity (e.g., in the direction of the latitude lines) down to actually go straight north.
If Santa Clause lived on this planet and took off from the north pole always pointing his sleigh directly south, the earth would be moving extremely fast beneath his sleigh when he arrived at the equator - so fast that he would circumnavigate the earth in a day.