Một vật có khối lượng 1 kg được giữ yên trên một mặt phẳng nghiêng bởi một sợi dây song song với   đường dốc chính. Biết α = 600. Cho g = 9,8 m/s2. Lực ép của vật lên mặt phẳng nghiêng là

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Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  He hasn’t been cheerful ____________ the death of his close friend.
   

• Choose the best answer for the following sentence:

  He has just left __________ the airport to meet his friend.
   

• Choose the best answer for the following sentence:

  That part of the country is famous __________it's pineapples.
   

• Choose the best answer for the following sentence:

  We went there ___________ car and stayed there for the whole day.
  
  

• Choose the best answer for the following sentence:

  We started our journey ___________ foot.
   

• Choose the best answer for the following sentence:

  He always prevents me _________ doing my duty.

• Choose the best answer for the following sentence:

  I write letters ___________ my left hand.
   

• Choose the best answer for the following sentence:

  The war victims suffered terribly ____________ cold and hunger.
   

• Choose the best answer for the following sentence:

  She is absent __________ class.

• Choose the best answer for the following sentence:

  It is very nice ______________ you to take so much trouble.