2. Questions Bank
  3. 9th Class
  4. Science
  5. Gravitation and Floatation

9th Class Science Gravitation and Floatation Question Bank Gravitation and Pressure

  • question_answer
    If it is safe to jump from a height of \[2\,\,m\] on to the earth, what would be the safe height on a planet where the value of \['g'\] is\[1.96\,\,m\,\,{{s}^{-2}}\]?

    A) \[2m\]                           

    B) \[4m\]

    C) \[6m\]               

    D)        \[10m\]  

    Correct Answer: D

    Solution :

     \[{{h}_{1}}=2m,\,\,{{g}_{1}}=9.8\,\,m\,\,{{s}^{-2}},\,\,{{g}_{2}}=1.96\,\,m\,\,{{s}^{-2}}\]. \[{{h}_{1}}{{g}_{1}}={{h}_{2}}{{g}_{2}},\,\,{{h}_{2}}=\frac{{{h}_{1}}{{g}_{1}}}{{{g}_{2}}}=\frac{2\times 9.8}{1.96}=10\,\,m\]


You need to login to perform this action.
You will be redirected in 3 sec spinner