Điều gì xảy ra đối với hệ số ma sát giữa hai mặt tiếp xúc nếu lực ép giữa hai mặt tiếp xúc tăng lên?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  I usually avoid _________ to parties because I have trouble __________ people's names.
  
  

• Choose the best answer for the following sentence:

  There’s a serious accidents on my way here. Many people were injured but only some __________ to hospital.

• Choose the best answer for the following sentence:

  The teacher as well as her students ____________ stuck in the lift but they were all safe after the police came.
  
  

• Choose the best answer for the following sentence:

  Do you often get your bike _______________ ?
  
  

• Choose the best answer for the following sentence:

  My family is trying ___________ where to spend our holiday.
  
  

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

  “I have just bought a new bike for you”, said my mother.
  
  

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

  It was such a boring play that we left the theater in the middle.
  
  

• Choose the best answer for the following sentence:

  With these outstanding pictures he was voted to be the best ___________ of the year.
  
  

• Choose the best answer for the following sentence:

  Five becomes eight by ___________ three.
  
  

• Choose the best answer for the following sentence:

  The people who cannot hear and speak are _________________.