9th Class Science Sample Paper Science Olympiad Model Test Paper-5

  • question_answer
    Velocity-time graph of a ball of mass 50 g rolling on a concrete floor is shown in the following figure. Calculate the acceleration and frictional force of the floor on the ball.

    A) \[-5m/{{s}^{-2}},0.5\,N\]

    B) \[-10m/{{s}^{-2}},0.5\,N\]

    C) \[-0.5m/{{s}^{-2}},10\,N\]

    D) \[-10m/{{s}^{-2}},10\,N\]

    E) None of these

    Correct Answer: B


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