Инструкция: Выберите один правильный ответ для каждого вопроса.

1. Как формулируется закон Гука?

• A) F = m a
• B) F = -k x
• C) F = k x^2
• D) E = m g h

2. Что характеризует жесткость пружины k?

• A) масса пружины
• B) жесткость пружины, величина сопротивления деформации
• C) длина пружины
• D) коэффициент трения с воздухом

3. Пружина с коэффициентом жесткости k = 200 N/m сдвинута на x = 0,05 m. Какая сила упругости действует на нее?

• A) 5 Н
• B) 10 Н
• C) 15 Н
• D) 20 Н

4. Какая формула выражает потенциальную энергию упругой деформации?

• A) U = k x
• B) U = 1/2 k x^2
• C) U = F x
• D) U = m g h

5. Если деформация x увеличивается в два раза, как изменяются сила и потенциальная энергия?

• A) F doubles, U doubles
• B) F doubles, U quadruples
• C) F quadruples, U doubles
• D) F quadruples, U quadruples

6. При деформации x какова величина упругой силы пружины?

• A) F = k x
• B) F = m x
• C) F = x / k
• D) F = k x^2

Тест по английскому языку на тему "Present Perfect / Present Perfect Continuous"

Класс: 9

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Вопрос 1:
Which sentence is in the Present Perfect tense?
A) I have eaten breakfast.
B) I am eating breakfast.
C) I was eating breakfast.
D) I eat breakfast.

Ответ: A) I have eaten breakfast.

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Вопрос 2:
Choose the correct form: She ______ (work) here for five years.
A) has worked
B) is working
C) works
D) was working

Ответ: A) has worked

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Вопрос 3:
Which sentence uses the Present Perfect Continuous?
A) They have studied for three hours.
B) They have been studying for three hours.
C) They study for three hours.
D) They are studying for three hours.

Ответ: B) They have been studying for three hours.

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Вопрос 4:
Select the correct usage: He ______ (play) football since he was a child.
A) has played
B) has been playing
C) plays
D) is playing

Ответ: B) has been playing

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Вопрос 5:
Which of the following sentences is incorrect?
A) I have seen that movie.
B) She has been to Paris.
C) They have been playing soccer yesterday.
D) We have finished our homework.

Ответ: C) They have been playing soccer yesterday.

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Вопрос 6:
Fill in the blank with the correct form: I ______ (read) this book for two weeks.
A) have read
B) have been reading
C) read
D) am reading

Ответ: B) have been reading

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Вопрос 7:
Identify the Present Perfect sentence:
A) We have visited London twice.
B) We are visiting London.
C) We visit London every summer.
D) We visited London last year.

Ответ: A) We have visited London twice.

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Вопрос 8:
Which sentence indicates an action that has recently finished?
A) She has been studying all day.
B) She has completed her project.
C) She plays the piano.
D) She was studying when I called.

Ответ: B) She has completed her project.

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Вопрос 9:
Choose the sentence that is in Present Perfect Continuous:
A) I have cleaned my room.
B) I have been cleaning my room.
C) I clean my room every week.
D) I am cleaning my room now.

Ответ: B) I have been cleaning my room.

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Вопрос 10:
Which option correctly completes the sentence?
They _____ ( study) all day for the exam.
A) have studied
B) have been studying
C) studied
D) are studying

Ответ: B) have been studying

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Результаты теста

• Тестированные ученики могут подсчитать количество правильных ответов и получить оценку за тест, опираясь на количество верных ответов из 10.