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  5. Force and Pressure

8th Class Science Force and Pressure Question Bank Force and Pressure Conceptive Objective Problems

  • question_answer
    Four actions: I  When pressed, the water present in a rubbe dropper rises. II A nail is pushed into a wall. III A postcard remains attached to an inverts glass of water. IV When pressed, a rubber sucker gets attached to a wall. Which of the following actions is not caused by atmospheric pressure?

    A)  I                                             

    B)  II

    C)  III                                          

    D)  IV

    Correct Answer: B

    Solution :

      In the case of a nail being pushed into a wall, the area of contact is very small. Therefore, a huge pressure is required to push the nail into the wall. Atmospheric pressure can never be so high that it is able to push a nail into a wall. Therefore, atmospheric pressure does not play any role in action II. The correct answer is B.


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