2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Motion in a Straight Line / सरल रेखा में गति

JEE Main & Advanced Physics Motion in a Straight Line / सरल रेखा में गति Question Bank Motion Under Gravity

  • question_answer
    A very large number of balls are thrown vertically upwards in quick succession in such a way that the next ball is thrown when the previous one is at the maximum height. If the maximum height is 5m, the number of ball thrown per minute is (take \[g=10\,m{{s}^{-2}}\])  [KCET 2002]

    A)             120     

    B)             80

    C)             60       

    D)             40

    Correct Answer: C

    Solution :

                    Maximum height of ball = 5 m So velocity of projection \[\Rightarrow \]\[u=\sqrt{2gh}\]\[=10\ m/s\] Time interval between two balls (time of ascent) \[=\frac{u}{g}=1\ sec=\frac{1}{60}min\]. So number of ball thrown per min. = 60


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