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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1999

  • question_answer
    A body takes \[{{t}_{1}}\] and \[{{t}_{2}}\] time respectively if fall from heights \[{{h}_{1}}\] and \[{{h}_{2}}\], then ratio of \[{{t}_{1}}\] and \[{{t}_{2}}\] is:

    A)  \[{{h}_{1}}:{{h}_{2}}\]                  

    B)         \[\sqrt{{{h}_{1}}}:\sqrt{{{h}_{2}}}\]

    C)  \[{{h}_{1}}:2{{h}_{2}}\]                

    D)         \[2{{h}_{1}}:{{h}_{2}}\]

    Correct Answer: B

    Solution :

    According to second equation of motion \[h=\frac{1}{2}g{{t}^{2}}\] \[\therefore \]                  \[\frac{{{t}_{1}}}{{{t}_{2}}}=\sqrt{{{h}_{1}}}:\sqrt{{{h}_{2}}}\]


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