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AMU Medical AMU Solved Paper-2010

  • question_answer
    Select the incorrect statements from the following S1 : Average velocity is path length divided by time interval. S2 : In general, speed is greater than the magnitude of the velocity. S3 : A particle moving in a given direction with a non-zero velocity can have zero speed. S4 : The magnitude of average velocity is the average speed.

    A)  \[{{S}_{2}}\]and \[{{S}_{3}}\]

    B)  \[{{S}_{1}}\]and \[{{S}_{4}}\]

    C)  \[{{S}_{1}},\text{ }{{S}_{3}}\]and \[{{S}_{4}}\]                             

    D)  All four statements

    Correct Answer: C

    Solution :

                     (i) Average velocity \[=\frac{Displacement}{Time\text{ }taken}\]                                 \[{{\vec{v}}_{Av}}=\frac{\Delta r}{\Delta t}\] (ii) As we know for a given time interval                 Distance \[\ge \]\[\left| Displacement \right|\] Average speed \[\ge \]\[\left| ~Average\text{ }velocity \right|\] (iii) A body moving in a given direction with non-zero velocity cannot have zero speed. (iv) In general average speed is not equal to magnitude of average velocity.


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