JEE Main & Advanced Physics Mathematical Tools, Units & Dimensions Question Bank Units

  • question_answer
    If \[x=at+b{{t}^{2}}\], where \[x\] is the distance travelled by the body in kilometres while \[t\] is the time in seconds, then the units of b are [CBSE PMT 1993]

    A) \[km/s\]

    B) \[km-s\]

    C) \[km/{{s}^{2}}\]

    D) \[km-{{s}^{2}}\]

    Correct Answer: C

    Solution :

    \[[x]=[b{{t}^{2}}]\Rightarrow [b]=[x/{{t}^{2}}]=km/{{s}^{2}}\]


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