Предмет: Физика, автор: ваня1249

как посчитать вес тела и силу тяжести

Ответы

Автор ответа: столет

сила тяжести: F=mg; где m-масса тела;
g=9,8 Н/кг ;
если тело находится в покое относительно Земли или движется равномерно и прямолинейно то вес тела совпадает с силой тяжестью:
P=mg.

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Task 1. Match activities and the places where you can do them. ЦИФРА и цифра

1. Gym 4. Department store 7. Aquarium

2. Fast-food restaurant 5. Theatre 8. Zoo

3. Library 6. Gallery 9. Cinema

See fish

Buy things

See works of art

Watch a film

See animals

Read

Have a snack

See a play

Task 2 Choose the right variant. ЦИФРА и цифра

1.restaurant 4. palace 7. park 10. cottage

2. zoo 5. pool 8. store 11.sports

3. gallery 6. library 9. tent

1. They live in a ............... in the country

2. There are lots of works of art in the ...........

3. This is a really big department ............... .They sell everything here!

4. My sister wants to see the animals at the ...............

5. I’m hungry. Can we go to a fast food .............?

6. The Queen lives in a big ............... .

7. They are staying in a small ............... at the campsite.

8. Timothy is keeping fit at the ............. centre

9. I’m taking this book back to the ...............

10. Why don’t we go swimming in the swimming ...............?

Task 3. Choose the correct item.

а. Bruce lives in a large block of ........ . ЦИФРА и БУКВА

1. flats

2. hotels

3. tents

b. They are staying in a fantastic ........ while they’re on holiday.

1. hotel

2. palace

3. tent

c. Are you ........? I totally disagree.

1. strange

2. serious

3. brilliant

d. There are too many ........ about what we can and can’t do.

1. timetables

2. grounds

3. rules

e. We pay the ........ for our house every month.

1. rent

2. price

3. ticket

f. He’s going to the International Summer ........ in August.

1. School

2. Flat

3. House

Task 4. Which is right?ЦИФРА и Цифра

1. You can ... at the cinema.

1. have a picnic

2. watch a film

You can .... at the gym.

1. exercise

2. relax

You can ... at the library

1. find a book

2. take pictures

You can ... at the aquarium.

1. see fish

2. watch football

You can ... at the theatre.

1. swim

2. see a play

Task 5 Choose the best variant. ЦИФРА и БУКВА

а You ... pay your rent. That’s the rule.

1 must

2. can't

3. mustn't

b You ...... eat in the classroom. It’s forbidden.

1. must

2. mustn't

3. can't

c You ... have any pets in this house. It’s not allowed

1. must

2. can't

3. can

d You ..... go to the doctor. You look very ill.

1. must

2. mustn't

3. can't

e You .... go to school. That’s the law.

1. must

2. can't

3. mustn't

Task 6 Choose the right item ЦИФРА и Цифра

1/Students ... wear a school uniform every day, but on Friday they ... be dressed as they wish.

1.must

2.mustn’t

3.can

4.can’t.

2. Students ... be late for the lesson.

1.must

2.mustn’t

3.can

4.can’t..

3. Students ... ask for help and have extra-classes.

1.must

2.mustn’t

3.can

4.can’t.

Students ... talk at the lesson.

1.must

2.mustn’t

3.can

4.can’t..

Students ...ask a question only with their hand raised.

1.must

2.mustn’t

3.can

4.can’t

Task 7 ЦИФРА и слово

1 What is the …..river in the world?

the biggest

bigger

biggest

2. He is a little … than me.

tall

tallest

taller

3. My doll is the …..of all.

more beautiful

beautiful

most beautiful

4. It is the …..church in my city.

the oldest

older

oldest

5. She is one of …..tennis players in the world.

good

better

the best

6. Your work isn’t very good. I know you can do …

bad

worse

better

7. Russia is ……. country in the world.

big

the biggest

bigger

8. My home task is a bit boring sometimes. I’d like to do something…..

interesting

more interesting

the most interesting

9. The weather is too hot in this city. I’d like to live somewhere ….

hotter

colder

warmer

Task 8 Write the correct form of the adjective in brackets ЦИФРА и слово

1.This is Sarah Jones and her brother, Mike. Sarah is (short)

than Mike, but he is (young) than her

2. He is the (young) student in his class.

3. They are both intelligent, but Sarah is (intelligent) than Mike.

4. In fact, Sarah is (intelligent) girl in their school.

5. Sometimes they argue, but Sarah thinks Mike is ( good) brother in the world.

Task 9 Put words in correct order to make sentences. ПОЛНОСТЬЮ

1. to/go/school./has/Tracy/to

2. the/has/do/He/washing up./to

3. early./wake/They/to/have/up

4. a/have/wear/to/don’t/uniform./We

5. your/You/make/needn’t/bed.

6. the/have/doesn’t/flat./to/She/clean

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