Một chất điểm dao động điều hòa. Khi đi qua vị trí cân bằng, tốc độ của chất điểm là 40cm/s, tại vị trí biên gia tốc có độ lớn 200cm/s². Biên độ dao động của chất điểm là:

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  Why don’t you put a better lock on the door, Mary?” Jane asked.
  
  

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

  He had hardly left the office when the phone rang.
  
  

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

  There were a lot of errors in his essay.
  
  

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

  I haven't got enough money, so I’m not going on holiday.
  
  

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

  She is so busy that she can’t come to the party.
  
  

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

  The noise next door did not stop until after midnight.
  
  

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

  Someone has already paid for it.
  
  

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

  I gave Alan his allowance. He finished his chores.
  
  

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

  I’ll give him your message. He will phone.
  
  

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

  We stayed in our seats. The game ended.