Một chất điểm có khối lượng m đang dao động điều hòa. Khi chất điểm có vận tốc v thì động năng của nó là ?

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:

  We cannot work out the reason of the problem.

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

  My grandparent / house / end / road //.

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

  Reach / grandparent / house / turn right / parking lot / left / the corner //.

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

  He agreed to go climbing although he hated heights.
  
  

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

  Unless you measure with the greatest accuracy, the door won’t fit and we’ll have trouble with it.
  
  

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

  You should have more sense of responsibility when you age 18.
  
  

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

  I have to hurry to he online before 9.00 this morning.
  
  

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

   “Minh has sent lots of emails to me since we were pen pals, ” said Thanh
  
  

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

  suggest                  burn                 current                     furniture

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

  mountain                mouse                 colour                      plough