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  3. 9th Class
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9th Class Science Sample Paper Sample Paper - 3 Term - 1

  • question_answer
      A body is moving on a rough level road with a speed of 15 ms-1 along a given direction. Does any force is needed? Why?

    Answer:

      Yes, a constant force is needed to maintain the motion. The force is needed to balance the force of friction acting due to the roughness of the road.                                                                                                                           (1)


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