[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 279: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions_uchebapro.php on line 280: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/session.php on line 1006: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3282)
[phpBB Debug] PHP Notice: in file /includes/session.php on line 1006: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3282)
[phpBB Debug] PHP Notice: in file /includes/session.php on line 1006: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3282)
[phpBB Debug] PHP Notice: in file /viewtopic.php on line 1025: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /viewtopic.php on line 1025: getdate(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Helsinki' for 'EEST/3.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3869: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3282)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3871: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3282)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3872: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3282)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3873: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3282)
Решение задач A (Механика) - ЕГЭ по физике

Решение задач A (Механика) - ЕГЭ по физике

Хоккейный вратарь отбивает шайбу массой 20 г, летящую в ворота со скоростью 72 км/ч, изменяя её направление на строго противоположное. Каков при этом импульс силы, действующей на шайбу?
#1
а7.
Какую наименьшую работу надо совершить, чтобы лежащий на полу однородный стережень длиной 1 м и массой 10 кг поставить вертикально?
#2
В последнюю секунду свободного падения тело прошло три четверти своего пути. Сколько времени и с какой высоты падало тело?
#3
А5

Комментарий к файлу: Решение напишите пожалуйста
5.jpg [24.76 Кб]
Скачиваний: 0

#4
Мяч,неподвижно лежавший на полу вагона поезда,движущегося относительно земли,покатился вперед по ходу поезда.это произошло в результате того,что скорость поезда относительно земли? 1.увеличилась
2.уменьшилась
3.не изменилась
4.изменилась по направлению
#5
камень брошен у поверхности Земли под углом 60 к горизонту с начальной скорость 30м/с. Считая небольшой участок его траектории дугой окружности, вычислите радиус дуги около верхней точки траектории.
#6
Тело движется по прямой. Под действием постоянной силы величиной 4 Н за 2 с импульс тела увеличился и стал равен 20 кг•м/с. Первоначальный импульс тела равен
#7
А4На тело массой 2 кг, имеющее началбную скорость 3 м/с, в течение 4 с действует сила, равная по модулю 2 Н. Определите модуль импульса тела после действия на него силы, если известно, что она направлена противоположно направлению начальной скорости.

Помогите с формулами.
#8
Материальная точка движется вдоль оси OX . На рисунке представлен график зависимости координаты материальной точки от времени.
Путь, пройденный материальной точкой за четвертую секунду, равен
1 2 м
2 -2 м
3 1 м
4 -1 м

F3-1_.GIF [6.37 Кб]
Скачиваний: 0

#9
А 7

ABCD0005.JPG [134.57 Кб]
Скачиваний: 0

#10
Струны рояля издают звуки в диапозоне от V1=90Гц до V2=9000Гц. Отношение граничных длин звуковых волн лямбда1 / лямбда2 этого диапазона рано.
#11
У поверхности Луны на космонавта действует сила тяготения 120 Н. Какая сила тяготения действует со стороны Луны на того же космонавта в космическом корабле, движущемся по круговой орбите вокруг Луны на расстоянии трех лунных радиусов от ее центра?
#12
И еще объясните пожалуйста А1,А5,А6,А7. :)

004.JPG [134.13 Кб]
Скачиваний: 0

#13
Брусок массой 200 г, находящийся на горизонтальной поверхности, движется равномерно со скоростью, модуль которой равен 10 м/с, под действием постоянной силы, модуль которой равен F = 2 Н, направленной под углом α = 60º к горизонту.


Изображение
http://ege.yandex.ru/media/F2-5.GIF

Мощность, развиваемая этой силой, равна
1 10 Вт
2 0,2 Вт
3 ≈ 17,3 Вт
4 20 Вт
Объясните плиз
#14
Человек тянет брусок массой 1 кг по горизонтальной поверхности с постоянной скоростью, действуя на него в горизонтальном направлении. Коэффициент трения между бруском и поверхностью 0,1. Скорость движения бруска 1 м/с. какаую мощность развивает человек, перемещая груз?
1 ... 7, 8, 9, 10, 11, 12, 13 ... 73