2. Questions Bank
  3. 9th Class
  4. Science
  5. Work and energy

9th Class Science Work and energy Question Bank Work Power and Energy Summative Objective Problems

  • question_answer
    An object of 100 kg is lifted to a height of 10 m vertically. What will be the work done? [\[\text{g}=\text{9}.\text{8 m}/{{\text{s}}^{\text{2}}}\]]

    A)  9800 J       

    B)  9008 J

    C)  9.8 J                                     

    D)  8.9 J

    Correct Answer: A

    Solution :

      \[m=100\,\,kg,h=10m,W=?\] work done against gravity \[W=mgh=100\times 9.8\times 10J=9800\,\,J\]                 


You need to login to perform this action.
You will be redirected in 3 sec spinner