9th Class Science Gravitation and Floatation Question Bank Gravitation IIT JEE Objective Problems

  • question_answer
    A ball released from a height h touches the ground in t sec. After t/2 s since dropping, the height of the body from the ground

    A)  h/2                       

    B)  h/4   

    C)  3h/4

    D)  Depends upon mass and volume of ball.

    Correct Answer: C

    Solution :

      \[h=\frac{1}{2}g{{t}^{2}}\] In\[\frac{T}{2}\]sec the distance travelled is\[\frac{1}{2}g{{\left( \frac{T}{2} \right)}^{2}}=\frac{h}{4}\] position of the ball from the ground is \[h-\frac{h}{4}=\frac{3h}{4}\]


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