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11th Class Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank 11th CBSE Physics Work, Energy, Power & Collision

  • question_answer
    A stone is dropped from the top of a high tower. Will the mechanical energy of the stone be conserved or not if the force of friction due to air is not neglected?

    Answer:

                    Mechanical energy is conserved only when forces involved are conservative. As force of friction due to air is non-conservative, therefore, mechanical energy of the stone is not conserved.


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