Предмет: Физика, автор: DOC0007

уравнение движения тела имеет вид S(t)=5t-10t(квадрат) определить начальную скорость тела

Ответы

Автор ответа: dnepr1

V=S/t=(5t-10t^2)/t=5-10t.
При t=0 V=5.
Можно определить из записи уравнения равнопеременного движения:
S=Vo*t+(at^2)/2 V0 = 5 a = -20

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Английский язык, автор: skahkov01

Помогите выполнить задание. (впр.2,3,4)
Текст на фото.
Exercise II. Choose the right word or word combination:
1. The economy of Great Britain is …
a) developing; b) highly developed.
2. British government controls …
a) import and export; b) production of coal, steel, ships, the railway and certain utilities.
3. Britain lives by …
a) industry and trade; b) agriculture.
4. Britain is a major …
a) producer of raw materials; b) financial and commercial centre of the capitalist world.
5. British manufacturing employs …
a) more than one-fifth of all workers; b) half of the total population.
6. The United Kingdom is the … in size of its GNP.
a) first; b) fifth.
Exercise III. Agree or disagree with the following statements according to the text.
The economy of Great Britain is among less developed countries in growth rates and competitiveness.
The United Kingdom has a developed mixed private-and public enterprise economy.
The state sector increased considerably during the 1980s and 1990s.
Small companies dominate in the economy of the U.K.
Agriculture accounts for more than 50% of the GNP.
The United Kingdom’s coal industry remains the largest and most technologically advanced in Europe.
Exercise IV. Answer the questions on the text.
What kind of country is Great Britain from the economic point of view?
What made Great Britain a commercial and maritime power?
What is the rank of the U.K. in the world in terms of the GNP?
What are the major industries in the U.K.?
What are the main economic problems in the U.K.?
Is Great Britain self-sufficient in petroleum?
In what sector of economy is the highest proportion of employees?

7 лет назад

Предмет: Алгебра, автор: Maarass

(-z-3)^2 дам 10 баллов

7 лет назад

Предмет: Алгебра, автор: dmitropolakov

343. Розв'яжіть рівняння:
1) 10 - (7 - 4x-x) = x + 8x - 9;
2) (5х1 - 3)-(2x+5) - 5x;
3) 6 + х - (2x - 9 + х) = 5;
V4) 12 - (6-9x-x)=x 45x -14.

7 лет назад

Предмет: Геометрия, автор: Ленуськалапуська

решите треугольник CDE, если: угол C=60°, CD=8дм, CE=5дм

10 лет назад

Предмет: Математика, автор: sarada

Выполнить деление с остатком 13 : 2 = 26 : 3 = 59 : 6 =

10 лет назад