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9th Class Science Work and energy Question Bank 9th CBSE Science Work and energy

  • question_answer
      A boy lifts a suitcase of 20 kg from the ground to a height of 1.2 m. Calculate the work done by him on the suitcase. [Given g = 10 ]   

    Answer:

                    Here, mass, m = 20 kg; height, h = 1.2 m Work done,


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