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9th Class Science Force and laws of motion Question Bank Force and Laws of Motion

  • question_answer
    Consider a porter standing on a platform with a suitcase which presses his head with a force of\[200\,\,N\]. If this force is taken to be the action, from where is the reaction force exerted and to where is it directed?

    A)  The head, on the suitcase  

    B)  The earth, on the suitcase

    C)  The earth, on the porter

    D)  The suitcase, on the earth

    Correct Answer: A

    Solution :

     According to Newton's 3rd law of motion, for every action there is an equal and opposite reaction. So, the head of the porter exerts a force of 200 N on the suitcase. This is the reaction.


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