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JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Work Done by Constant Force

  • question_answer
    A 50kg man with 20kg load on his head climbs up 20 steps of 0.25m height each. The work done in climbing is [JIPMER 2002]

    A)             5 J      

    B)             350 J

    C)             100 J  

    D)             3430 J

    Correct Answer: D

    Solution :

                    Total mass = (50 + 20) = 70 kg Total height = 20 × 0.25 = 5m \ Work done = mgh = 70 × 9.8 × 5 = 3430 J


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