Тело движется равномерно по окружности радиусо 0,5м, обладая кинетической энергией 10Дж. Какова сила, действующая на тело? Как она направлена? Чему равна работа этой силы?

Прочитайте
текст. Выберите один из предложенных вариантов ответа.

The
job with a fashion house in the city centre sounded interesting. The letter I
had recently received from the boss was friendly. He had invited me to visit
the office and join him for lunch. The appointment (A10) ... for twelve
o'clock. Naturally I thought long and hard about what to wear. In the fashion
business, of course, you (A11) ...
to look smart. In the end I decided to wear the most expensive clothes. These
were a pair of boots and a pair of fashion jeans, which (A12)... me a week's
salary.

But
hardly (A13) ... at the office when I (A14) ... that exactly the wrong clothes
(A15) .... The men in the office (A16) ... dark suits and ties. The boss was
just as friendly as his letter had been. We talked about the business and
finally went out for lunch. But when the restaurant manager caught sight of me
he (A17) ... his head apologetically and said: "Sorry, sir, but you
(A18)... to this restaurant if you (A19)... into more formal clothes. We don't
admit anyone in jeans." So we started looking for somewhere else to eat.

A10.

1) had been
fixed

2) is fixed

3) fixed

4) had fixed

A11.

1) expect

2) expected

3) are
expected

4) are expecting

A12.

1) were
costing

2) has costed

3) had cost

4) costed

A13.

1) had I arrived

2) have I
arrived

3) I had arrived

4) I arrived

A14.

1) have
realised

2) had
realised

3) realised

4) was realising

A15.

1) had chosen

2) were chosed

3) had been
choosing

4) had been chosen

A16.

1) weared

2) were
wearing

3) had been
wearing

4) were worn

A17.

1) shaked

2) had shaken

3) shook

4) was shaking

A18.

1) will admit

2) will be admitting

3) will be
admitted

4) would be admitted

A19.

1) change

2) are changed

3) have been
changed

4) will be changed