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9th Class Science Time and Motion Question Bank Motion

  • question_answer
    A particle is moving along a circular track of radius 1 m with uniform speed. Find the ratio of the distance covered and the displacement in half revolution.

    A) \[1:1\]               

    B)        \[0:1\]

    C) \[\pi :1\]            

    D)        \[\pi :2\]  

    Correct Answer: D

    Solution :

     In a circular track, (i) Distance covered in \[\frac{1}{2}\] revolution\[=\]\[\frac{2\pi r}{2}=\pi r\] (iii) Displacement in half revolution\[=2r\]. We have\[r=1\].             \[\therefore \]Ratio\[=\pi :2\]


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