Hai dao động điều hòa có phương trình dao động lần lượt là  \({x_1} = 5cos\left( {2\pi t + \frac{\pi }{6}} \right)cm,{x_2} = 5\sqrt 3 cos\left( {2\pi t + \frac{{2\pi }}{3}} \right)cm\). Biên độ và pha của dao động tổng hợp là 

10cm; \(\frac{\pi }{2}\)            

 \(5\sqrt 7 \)cm,   \(\frac{5\pi }{6}\)       

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

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

  height                bright                   mind                weight

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

  serial               servant                     service                 servile

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

  pond                off               follow             money

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

  eight              weight               height                  freight

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

  The teenager should have phoned his parents earlier.
   

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

  What a pity you failed the final exam!
  
  

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

  The football coach lost his temper because the best player on the team missed the match.
  
  

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

  Whatever subjects you choose makes no difference to me.
   

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

  People have plenty of leisure time.

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

  pursuit               suitable             recruit                building