9th Class Science Gravitation and Floatation Question Bank 9th CBSE Science Floatation

  • question_answer
      Why do we prefer a sharp knife for cutting than a blunt one?     

    Answer:

       The area of a sharp edge is much less than the area of blunt edge. For the same force, pressure is more for sharp edge than the blunt edge. Hence, sharp edge cuts better and easily.


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