Предмет: Физика, автор: jgkxkxkfifxjjdhfj59

Лифт движется вниз с ускорением 1 м/с^2. Каков будет вес тела, если масса тела находящегося в лифте, равна 70 кг?

Ответы

Автор ответа: vvbarashkovsky
0

Ответ: P=630Н

Объяснение:

дано      a=1м/с2

m=70 кг

P- ?

так как ускорение вниз то

P=m(g-a)=70*9=630Н

Похожие вопросы
Предмет: Английский язык, автор: olyakolesnikov
Задание № 2:

Раскрой скобки и напиши глаголы в Present Continuous.

1) He his teeth at the moment. (brush)

2) We the vacation now. (plan)

3) He in the bed now. (sleep)

4) I can't talk now. I the dishes. (wash)

5) Our baby now. (cry)

6) He in the park now. (cycle)

7) They on the beach. (lie)

8) He chess. He plays chess with his friend every Friday evening. (play)

9) She at shcool. (study)

10) They now. (travel)

Задание № 3:

Только одно из двух предложений написано верно. Выбери правильный перевод предложений.

1) Я не понимаю тебя.

A. I am not understanding you.

B. I don't understand you.

2) Я ее прощаю.

A. I am forgiving her.

B. I forgive her.

3) Я слышу тебя, не кричи.

А. I hear you, don’t shout.

В. I am hearing you, don't shout.

4) Мне нравится моя работа.

А. I like my job.

B. I am liking my job.

5) Я тебе верю.

А. I believe you.

B. I am believing you.

Задание № 4:

Read the text and answer the questions.



1)Kate and Jim live in a big city. 2)There are many schools, plants, factories in the city. 3)There are many cinemas, theatres, and different shops in it. 4)This city is very beautiful.

5) Their mother buys bread at the baker's shop. 6) She buys milk and butter at the dairy. 7) Kate buys sweets at the sweetshop. 8) Jim buys his toys at the toy shop. 9) They all like to go shopping. 10) On Sundays Kate and Jim usually go to the cinema.

11) It is Sunday. 12) Kate, Jim and their mother is in the cafe. 13) Kate is eating an ice-cream. 14) Jim is eating his cake.



Questions:

1) Where do Kate and Jim live?

2) Are there many schools, plants, factories in their city?

3) Where does Kate buy her sweets?

4) Are Kate and Jim relatives?

5) В одном из предложений не верно употреблен вспомогательный глагол "to be". Это предложение номер: