2. Sample Papers
  3. NTSE

NTSE Sample Paper NTSE SAT Practice Test-17

  • question_answer
    If momentum of a body increases by 50%, its kinetic energy will increase by

    A) 50%                             

    B) 100%

    C) 125%    

    D) 150%

    Correct Answer: C

    Solution :

    [c] \[{{P}_{2}}=\frac{3}{2}{{p}_{1}}\]          \[\therefore \]                    \[{{v}_{2}}=\frac{3}{2}\,\,{{v}_{1}}\] We have, \[E\,\,\infty \,{{v}_{2}}\]    \[\therefore \]                        \[{{E}_{2}}=\frac{9}{4}\,{{v}^{2}}_{1}\] Increase in K.E. \[=\frac{({{E}_{2}}-{{E}_{1}})}{{{E}_{1}}}\times 100\] =125%                        


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