из начала координат одновременно начинают двигаться две точки. Первая движется по оси Ох со скоростью 2 м/с, вторая - по оси Оу со скоростью 5 м/с. с какой скоростью точки удаляться дру от друга?
Возьмём координаты точек в любой момент времени. Например, через одну секунду после начала движения точек.Построим отрезок АВ с координатами этих точек на концах.Получился прямоугольный треугольник.По Теореме Пифагора находим длину отрезка АВ.АВ=√21Т.к. мы брали изменение координат во временной отрезок 1 секунду, мы можем сказать, что за одну секунду одна точка отдаляется относительно другой на расстояние √21 метра.Ответ: √21м/с.
Автор:
mckenziegordonСкорость движения первой точки Vx = 2 м/сек
Скорость движения второй точки Vу = 5 м/сек
Поскольку направления движения перпендикулярны величина разности скоростей может быть вычислена по теореме Пифагора
|ΔV| = √(5²-2²)=√21 м/сек
Точки удаяются друг от друга со скоростью √21 м/сек
Автор:
madeleinefkhxДобавить свой ответ
помогите вставить вместо пробелов артикли : A;THE;---
He slipped and ... wine spilled all over ... carpet.
Brian seems ... ideal person for ... job.
After studying ... languages at ... university Steven became ... interpreter at... United Nations.
It's very important for ... parents to encourage ... independence in their children.
I saw ... woman coming up ... path to .. house. It was ... woman I had seen at... station ... day before.
My mother loves ... Italian operas even though she can't understand ... words.
... Neil Armstrong, ... first man on ... moon, used to work for NASA.
... police were called in to deal with ... situation.
... people think ... climate in ...Mediterraneanis ... best in ... world.
I finally found ...book under....pile of...old newspapers and....magazines.
....council has passed ...new law about riding ...bikes on ...sidewalks.
In ....late evening , I often see ...rabbits at...edge of...yard.
....art of writing began in ....Mesopotamia, ....modern country of ....Iraq , millennium and ...half before it appeared in ....China.
Many people are severely allergic to....poisonous plants such as ...ivy, hemlock and ....pokeweed.
To produce their fine silk , ....silkworms feed chiefly on....mulberry leaves .
Do you know ....white-haired man who is feeding ....pigeons?
It was ....lovely house but ....stairs were too steep for..old people.
If you give me...hand with.....dishes , we can go out together .
There has been ...dramatic rise in unemployment in ....past ten years .
Every morning I had to sort out ...mail and distribute .....faxes, before I could have ...cup of coffee .
We spent ....wonderful evening with ...Stones .
...gentle wind was blowing through...trees.
... room was completely empty so some of us sat down on ....floor while....other leaned against ...wall .
Предмет:
Английский языкАвтор:
holden2vpfОтветов:
Смотреть
помогите пожалуйста вместо многоточия вставить артикли: A;THE;--
I find it very difficult to be optimistic. To tell... truth I have applied for 130 jobs in ... last two years and it's always ... same story. Come back when you've got ... bit of experience. I mean, how can I get... experience if nobody wants to give me ... job?
Just... note to say thank you for ... lovely day yesterday. If was really very hard to get back to work after such ... relaxing time. Delicious food, good company, ... beautiful garden - it really felt like ... mini-holiday. ... kids had... great time too, and are still talking about... dog and... pool. Would you like to come over to us... next weekend? You could come for ... lunch on ...Saturday or... Sunday, and we could go for ... walk in ... hills afterwards if... weather is good. Looking forward to seeing you all next weekend, and with ... lot of thanks again for yesterday.
...man had ... row with his wife. This made him leave ... home later than usual so he drove to work very fast. While he was going round ... corner, ... dog ran across ... road. ... man stamped on ... brakes,... car skidded (... road was in ... very bad condition),... man lost control of his car and crashed into ... lorry which was parked on ... double yellow line.
Предмет:
Английский языкАвтор:
allenОтветов:
Смотреть
уравнение движение материальной точки имеет вид х= 2+2t-2t². укажите момент времени, в который скорость точки равна 0
"на двух пешеходных зонах укладывали тротуарную плитку. площадь 1 зоны равна 75 м,площадь 2 зоны 63 м .на 2 зону ушло на 60 плиток меньше.сколько плиток ушло на каждую зону,Если на 1 м затрачивали одинаковое количество плиток
Предмет:
МатематикаАвтор:
bowestОтветов:
Смотреть