2. Sample Papers
  3. NTSE

NTSE Sample Paper NTSE SAT Practice Test-11

  • question_answer
    A ball falls from a height of 10m. On rebounding, it loses 30% of its energy. The ball goes upto a height of

    A) 5m                               

    B) 6m

    C) 7m          

    D) 8m

    Correct Answer: C

    Solution :

    [c] Final energy \[=\frac{70}{100}\]  Initial energy \[mg{{h}_{2}}=\frac{7}{10}mg{{h}_{1}}\] \[\therefore \,\,{{h}_{2}}=\frac{7}{10}{{h}_{1}}=7\,m\]                       


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