К одному плечу рычага подвешен груз весом 4400 Н. При равномерном поднятии его на 0,44 м к другому плечу приложили силу 500 Н, при этом точка приложения силы переместилось на 2 м.
A) Определите полную работу Аполная (записать формулу и вычислить).
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В) Определите полезную работу Аполезная (записать формулу и вычислить).
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С) Определите КПД наклонной доски (записать формулу и вычислить в

1. i must brush my teeth. - anyone, most likely some disobedient child.

2. i have to brush my teeth. - a patient of dentist's, a human with diseased tooth.

3. i must tidy my room. - anyone, most likely some disobedient child.

4.i have to tidy my room. - anyone, probably a child.

5. i must take the medicine. - someone with easy form of illness.

6. i have to take the medicine. - most likely, a regular patient

mum: is it your new friend, jane? jane: yes mum meet nichole.nichole: nice to meet you mrs jones .mum: where are you from nichole? nichole: i'm french. i'm from paris.

1. is your house had break?

2. is he your best friend?

3.  is here had an old castle?

4.  is this castle visited by tourists?

5.  when to you has said the truth?

6.  who has painted a picture ''the sunflower''?

7.  is a space examining by astronauts?

8.  what to them has still offered?

9. is thief has arrest by this police officer?

10.  is a window maybe be open?

11. is this work can be done?

12.  is this writer writing a new book?

13. is he known, as a talented musician?

14. why they wear a funny clothes?

15. which language used in thailand?

16.  is a medical treatment for a cancer can be opened?

17. is he has won?

18.  is climate changing?

19.  why the public needs to be warned about it?

20. is this brilliant the biggest in the world?

21.  do you like, when shout on you or talked about you?

winter holidays  my name is пиши своё . i’m thirteen years old. my favourite season is winter. my holidays began on the 28th of december. i am in a good mood because new year’s day and two weeks of the rest will come soon. i like festive bustle. in the first day of our holidays i and my sister decorated our flat and we also decorated the christmas tree in the evening. there is a tradition in our family: we all go skiing to the forest in the morning in the last day of the year. we enjoy beauty of the forest, breath fresh air and have a great time. usually our walk takes us two hours. then we begin to prepare for holiday. in the first day of january we went to celebrate our grandmother and grandfather and next day we went to street festivities at city square. the whole holidays i and my sister were spending much time in the street. we could go skating, having a fight with snowballs or making a snowman. also we walked in the snow-covered park. i liked my winter holidays very much.