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Вопрос по физике:
Каким должно быть горизонтальное ускорение автомобиля, чтобы устойчивое положение пассажира соответствовало углу наклона 45°? (Желательно с дано и решением)
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Автор:
velvet
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На тело на наклонной плоскости действуют 2 силы
N+m*g=m*a ( векторная запись)
ОУ: N*cosa=m*g (1)
по теореме Пифагора N=m*√(g^2+a^2)
m*cosa*√(g^2+a^2)=m*g
cos^2a*(g^2+a^2)=g^2
a^2= g^2*(1-cos^2a)/cos^2a
а=g*sina/cosa=g*tg45=g
Ответ a=g
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Вопрос по геометрии:
3. В треугольниках АВС и MNK .Угол А= 35,В=65,С=80,М=70,К=35. Чему равен угол N? а)35; б)75; в)80.-
Ответов: 2
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3 года назад
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Вопрос по другим предметам:
Какие измерения и сравнения надо проводить,чтобы определить,как быстро вода заполнит трубку с почвой?-
Ответов: 1
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3 года назад
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Вопрос по математике:
1/2 от 296 2/3 от 516 3/4 от 516-
Ответов: 1
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3 года назад
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Вопрос по английскому языку:
помогите англ. 11 класс
6.Choose the correct answer.
1 “I am going to travel by plane.”
He said that he is going / was going to travel by plane.
2 “I’ll pick everyone up and drive them there.”
She said that she will pick / would pick everyone up and drive them there.
3 “I am painting a new piece for the exhibit.”
Mario said he was painting / had been painting a new piece for the exhibit.
4 “I couldn’t read the rest of the book.
She said she couldn’t read / had couldn’t read the rest of the book.
5 “I had eaten all the sweets.”
She said she ate / had eaten all the sweets.
6 “We were driving for hours in the snow.”
They said that they had been driving / drove for hours in the snow
7 Rewrite the first sentence in reported speech.
1 “Where is the TV controller?”
Dad _____________________________________________________.
2 “I will see you tomorrow in class.”
She _____________________________________________________.
3 “Tanya, whose jacket is this?”
He ______________________________________________________.
4 “The phone is ringing.”
She _____________________________________________________.
5 “Do you see your brother often?”
She _____________________________________________________.
6 “We left for New York yesterday.”
They ___________________________________________________
8.Choose the correct answer.
1 Janet told / said / asked that she hated the class.
2 We told / said / asked if it was a long journey.
3 They told / said / asked me the museum was closed.
4 The artist told / said / asked that he used iron to make the statue.
5 Georgia told / said / asked her friends that she would be late
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Ответов: 1
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3 года назад
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