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Консультация № 196103
12.08.2019, 21:43
0.00 руб.
0
3
1
Здравствуйте! У меня возникли сложности с таким вопросом:
Небольшое тело скользит со скоростью V = 10 м/с по горизонтальной плоскости, приближаясь к щели. Щель образована двумя отвесными параллельными стенками, находящимися на расстоянии d = 0,05 м друг от друга. Глубина щели H = 1 м. Сколько раз ударится тело о стенки, прежде чем упадёт на дно? Удар о стенку абсолютно упругий (т.е. при ударе модуль скорости не меняется и угол отражения равен углу падения).
Небольшое тело скользит со скоростью V = 10 м/с по горизонтальной плоскости, приближаясь к щели. Щель образована двумя отвесными параллельными стенками, находящимися на расстоянии d = 0,05 м друг от друга. Глубина щели H = 1 м. Сколько раз ударится тело о стенки, прежде чем упадёт на дно? Удар о стенку абсолютно упругий (т.е. при ударе модуль скорости не меняется и угол отражения равен углу падения).
Обсуждение
16.08.2019, 16:14
общий
это ответ
Здравствуйте, dar777!
Если бы не было второй стенки, то тело упало бы с высоты за время
(с),
[1, с. 14], а дальность его полёта составила бы
(м),
или
то есть вмещала бы в себя 
целых длин щели с остатком. Поскольку в отсутствие трения при абсолютно упругих ударах тела о стенки щели вертикальная составляющая скорости не изменяется, а горизонтальная составляющая всякий раз меняет своё направление (угол отражения равен углу падения), постольку тело ударится о стенки раз.
Литература
1. Аксенович Л. А., Ракина Н. Н., Фарино К. С. Физика в средней школе. -- Минск: Адукацыя i выхаванне, 2004. -- 720 с.
Если бы не было второй стенки, то тело упало бы с высоты за время
(с),[1, с. 14], а дальность его полёта составила бы
(м),или
то есть вмещала бы в себя целых длин щели с остатком. Поскольку в отсутствие трения при абсолютно упругих ударах тела о стенки щели вертикальная составляющая скорости не изменяется, а горизонтальная составляющая всякий раз меняет своё направление (угол отражения равен углу падения), постольку тело ударится о стенки раз.Литература
1. Аксенович Л. А., Ракина Н. Н., Фарино К. С. Физика в средней школе. -- Минск: Адукацыя i выхаванне, 2004. -- 720 с.
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
16.08.2019, 19:43
общий
А как получили 90,3d?
N = V/d*корень2H/g
N = V/d*корень2H/g
Об авторе:
Лучшая увеличительная линза - ноги.
Лучшая увеличительная линза - ноги.
16.08.2019, 19:49
общий
Адресаты:
dar777 А как получили 90,3d?
N = V/d*корень2H/g
Антон! У Вас с мыслительными способностями всё в порядке? Для чего Вы засыпаете портал своими вопросами, если не в состоянии вникать в получаемые ответы?
Об авторе:
Facta loquuntur.
Facta loquuntur.
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