Предмет: Физика, автор: Lliirriikk

Довжина одного плеча важеля 20 см, а другого – 50 см. До більшого плеча важеля прикріпили тіло масою 2 кг. Тіло якої маси необхідно прикріпити до меншого плеча, щоб важіль перебував у рівновазі? ​

Ответы

Автор ответа: semegukl
1

F1/F2=d2/d1

F1=m1g

F2=m2g

m1g/m2g=d2/d1 звідси слідує:

m1/m2=d2/d1

m2=m1d1/d2

m2=2*20/50=0.8

Похожие вопросы
Предмет: Английский язык, автор: GAMERonline
________________________________________
Решите 2 задания 
В 1 надо составить предложения из колонок
Во 2 надо Вставить глаголы вот текст ниже
________________________________________

3.Match the words from the first and the second columns to form meaningful expressions, then find the correct translation and complete it.1 to get on
2 to get on with
3 to look for
4 to look out for
5 to make up 
6 to make up
7 to put on
8 to turn off
9 to turn on
10 to turn out
11 to turn upA a nice flat

В a very interesting story С as an old man D early E fine
F in the examination G smart clothes H the classmates
I the computer and check the mail
J the criminal
К the lights when you leaveа

a  включать _
Ь выдумывать _
С выключать _
d загримировать_
е искать преступника
f ладить с _
g надевать _
h оказаться _
i подыскивать _
j преуспеть _
к приходить._4. Vocabulary. The first day on a new job is like the first day of school.
What should you know on your first day at work? Complete the sentences with the verbs that fit in the correct form.Do some research to (0) find out all you can about your new employer and the company.
Plan what you’re going to (1)_on during the first week of work. Choose
the suit in which you look your best. Before going to sleep the night before,
(2)-through things that you will need for your first day at work. Be sure
to have a pen to (3) _ in those necessary forms.
If you (4)-up on time, it will make a good impression on your employer.
(5)  - of clever questions about the work, even when you may already
know the answers.
At home write by name all the workers you can remember. You can continue (6)______ in your list on Day Two.
That first day of a new job usually (7) _ out to be physically and emo-
tionally tiring. But each day after will get easier and easier.
Предмет: Геометрия, автор: kucher20081
Предмет: Химия, автор: троль34