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

  • question_answer
    Ravi pushes a rock with a force of 10 N for 5 minutes but it remains as it is. The work done by him is

    A) positive                       

    B) negative

    C) zero             

    D) none of these

    Correct Answer: C

    Solution :

         \[W=F\times d;\]As the rock remains as it is \[\therefore d=0,\]hence work done \[w=zero\]          


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