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7th Class Science Related to Competitive Exam Question Bank Work and energy

  • question_answer
    The potential energy associated with an object of mass 6 kg placed at a height 12 m from the ground is \[(g=10m/{{s}^{2}})\]

    A) 7.2 J                           

    B) 72 J

    C) 7200 J            

    D) 720 J

    Correct Answer: D

    Solution :

        P.E. = mgh \[=6\times 10\times 12\] \[=720J\]


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