Một người kéo một hòm gỗ khối lượng 80kg trượt trên sàn nhà bằng một dây có phương hợp góc 60⁰ so với phương ngang. Lực tác dụng lên dây bằng 100 N. Công của lực đó khi hòm trượt đi được 10m là

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Một số câu hỏi khác có thể bạn quan tâm.

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

  The chart / also / say / the number / visitors / Hue / increase / sharply / this / mean / Hue / become / attractive tourist destination / recent years//.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  The Statue of Liberty is the statue of a woman, who is wearing a loose robe and a crown on her head.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The Sydney Opera House and the Sydney Harbour Bridge, that make Sydney famous,

  attract millions of visitors from all over the world.

• Find a mistake in the four underlined parts of the sentence and correct it:

  Although, New York is the most expensive in the world, but many people wish to live there.

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

  Hanoi / inhabit / since / at least 3000 BC / become / center / culture / economy / politics / Vietnam //.
  
  

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

  Its population / estimate / over 3.3 million / 2007 / constantly / grow / due to / become / major metropolitan area / Northern Vietnam.
  
  

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

  Hanoi / experience / the typical climate / northern Vietnam / where / summers / hot and humid / winters / relatively / cool and dry //.
  
  

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

  Hanoi / famous / ancient beauty / excellent museums / abundance / opportunities /
  shopping, leisure activities / locals / tourists //.
  
  

• Find a mistake in the four underlined parts of the sentence and correct it:

  In spite of many people found a better and happier life in America, they did not find America

  equal opportunities.

• Find a mistake in the four underlined parts of the sentence and correct it:

  The statue of Liberty, stood on an island in the harbour, greets everyone who comes to New York by sea.