Tại nơi có gia tốc trọng trường g, một con lắc đơn có khối lượng 50 (g) dao động điều hòa, với động năng Ed = 3(1 - cos10t) (mJ). Khi con lắc chuyển động chậm dần theo chiều dương đến vị trí có động năng bằng thế năng thì li độ dài s của con lắc bằng:

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  What do people ___________ the 25^th wedding anniversary? Is it "silver anniversary"?
   

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

  The station will be closed for some days because they are replacing the escalators.
  
  

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

  That woman wrote to me so that I gave her some advice.
  
  

• Choose the best answer for the following sentence:

  Do you ___________ your birthday each year? 

   

• Choose the best answer for the following sentence:

  ___________ would you like to celebrate your birthday, at the day time or in the evening?  

• Choose the best answer for the following sentence:

  Do you ___________ your birthday cake or do you buy it?
   

• Choose the best answer for the following sentence:

  Last night I _________ to my close friend's birthday party.
   

• Choose the best answer for the following sentence:

  There __________ a lot of fruit and drinks at the party yesterday.
  
  

• Choose the best answer for the following sentence:

  My close friend invited a lot of people _____________ her party.
   

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

  place / Manila / took / Philippines / the 2nd Asian Games / in / from May 1 to May 9, 1954