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

  • question_answer
    Kinetic energy of a body moving with speed 10 m/s is 30J. If its speed becomes 30 m/s, its kinetic energy will be

    A) 10 J                            

    B) 90 J

    C) 180 J                          

    D) 270 J

    Correct Answer: D

    Solution :

        270 J


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