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

  • question_answer
      A force applied on a body of mass 4 kg for 5 s changes its velocity from 10 m/s to 20 m/s. Find the power required. 

    Answer:

                   Given, m = 4 kg, t = 5 s, u = 10 m/s, v = 20 m/s, P = ? Power,             


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