Một người ngồi bình thường trên ghế trong đu quay chuyển động tròn đều. Khi quay đều theo đường tròn, tại vị trí nào độ lớn của hợp lực tác dụng vào người đó là cực đại?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The English teacher required so different skills that students need to perfect.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Each year, tourists from all parts of Vietnam travel to Nghe An to visit a birthplace of uncle Ho.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Among the students are many foreigners which attend Vietnamese language class 

  at the center.

• Choose the correct sentence which is built from the words and phrases given:

  what / reason / his change / mind?//.
  
  

• Choose the correct sentence which is built from the words and phrases given:

  I / just complete / two-year bilingual secretarial course/ local college //
  
  

• Choose the word that has the underlined part pronounced differently from the rest: 

  small                         thank                  suntan                      channel

• Find a mistake in the four underlined parts of the sentence and correct it:

  The works performed by the students in our class are worth our spending more time.

• Choose one sentence that has the same meaning to the root one:

  Having told about his bad result of the driving test, he went out without saying any word.
  
  

• Choose one sentence that has the same meaning to the root one:

  Knowing nothing about Nga illness. I didn't visit her.
  
  

• Choose one sentence that has the same meaning to the root one:

  By the time we arrived, all the students in my class had left.