9th Class Science Force and laws of motion Question Bank 9th CBSE Science Force and laws of motion

  • question_answer
      Why is it advised to tie any luggage kept on the roof of a bus with a rope?         [NCERT]

    Answer:

       When a bus starts suddenly, the lower part of luggage kept on the roof being in contact with the bus begins to move forward with the speed of the bus; but the upper part due to inertia of rest tend to remain at rest. Therefore, the upper part is left behind and hence luggage falls backward. So, it is advised to tie any luggage kept on the roof of a bus with a rope.


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