WB JEE Medical WB JEE Medical Solved Paper-2007

  • question_answer
    The kinetic energy of a body becomes four times its initial value. The new momentum will be ...............

    A)  same as the initial value

    B)  twice the initial value

    C)  thrice the initial value

    D)  half of its initial value

    Correct Answer: B

    Solution :

                     \[K\propto {{p}^{2}}\] \[\Rightarrow \]               \[\frac{{{p}_{2}}}{{{p}_{1}}}=\sqrt{\frac{{{K}_{2}}}{{{K}_{1}}}}=\sqrt{4}\] \[\Rightarrow \]               \[{{p}_{2}}=2{{p}_{1}}\]


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