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3rd Class Science Lights, Sound and Force Question Bank Light Sound and Force

  • question_answer
    Select the forces that the women X and Y in the diagram need to overcome to carry their groceries.            

    A)
    X Y
     X-Gravity        Y-Friction
                   

    B)       
    X Y
     X-Friction        Y-Gravity
                   

    C)       
    X Y
     X-Friction         Y-Friction                 
                   

    D)       
    X Y
     X-Pull          Y-Push

    Correct Answer: B

    Solution :

              Woman 'X' needs to overcome friction to slide the trolley smoothly. Woman 'Y' needs to hold up the shopping bags against gravity,                                       


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