[Archive!] Pure mathematics, physics, chemistry, etc.: brain-training problems not related to trade in any way - page 18
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The wheels have nothing to do with it, but the runway will "run out" before enough time to gain speed.
If the runway is infinite, the "transporter" (second version of the problem) will take off
Will be able to take off. If the speed gain is not from the wheels, but from propellers or jet propulsion (in which case it doesn't matter what happens to the wheels of the plane)
but how will it be ensured that the track moves in the opposite direction at equal speed? If it is equal, then the aircraft is standing. The incorrectly set problem is.
Ah, I seem to recall. The trick there is to work out what "the speed of the plane's wheels was equal to the speed of the runway" means.
The problem is that if the plane is running on the runway without the wheels slipping, the instantaneous speed of the lower point of the wheel relative to the pavement is zero. What is the 'wheel speed' in this problem?
Ну вот пусть эта и будет общей. Тему уже переименовал.
2 AlexEro: помните тот мерзкий предельчик? Жирную точку ставить рановато, оказывается. Все не так просто, на мехматовском форуме тоже спор разгорелся. Если интересно - загляните сюда.
There is only one thing to be said. A mere "bot" will never register on that site. By the way, what kind of website is it?
а как обеспечится условие, что дорожка будет двигаться в противоположнном направлении с равной скоростью? Если равна, значит самолет стоит. Некорректно поставленная задача это
The aircraft will move relative to the ground, no matter how fast the belt underneath it needs to be twisted. The thrust is not provided by pushing off the webbing, but by propellers or jet propulsion.
Самолет (реактивный или винтовой) стоит на взлётной полосе с подвижным покрытием (типа транспортёра). Покрытие может двигаться против направления взлёта самолёта, то есть ему навстречу. Оно имеет систему управления, которая отслеживает и подстраивает скорость движения полотна таким образом, чтобы скорость вращения колёс самолёта была равна скорости движения полотна.
Вопрос: сможет ли самолёт разбежаться по этому полотну и взлететь?
won't take off
The aircraft will move relative to the ground, no matter how fast the belt underneath it needs to be twisted. The thrust is not provided by pushing off the webbing, but by propellers or jet propulsion.
The contradiction is that if the plane took off, the speed of the webbing was not equal to the speed of the plane, which was the condition of the problem. The plane wiped the web :)
MSU Forum on Higher Mathematics.
Yuri, I have a physics problem. :о)
An aeroplane is standing on a scale, hermetically sealed. There is a ton of flies flying in it (inside). None of the flies land. The plane is weighed, this value is known. At the command a ton of flies land. How much will the plane weigh?
противоречие в том, что если самолет взлетел, то скорость движения полотна не была равна скорости движения самолета, что являлось условием задачи. Самолет протер полотно :)
By the terms of the problem, the speed of the web is governed by the speed of the aircraft, which means that it will move against the aircraft with an acceleration of minus sign, but with the same speed modulo.