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JEE Main & Advanced Physics Two Dimensional Motion Question Bank Critical Thinking

  • question_answer
    A small block is shot into each of the four tracks as shown below.  Each of the tracks rises to the same height.  The speed with which the block enters the track is the same in all cases.  At the highest point of the track, the normal reaction is maximum in                                               [IIT-JEE Screening 2001]

    A)                        

    B)

    C)

    D)

    Correct Answer: A

    Solution :

                    Normal reaction at the highest point             \[R=\frac{m{{v}^{2}}}{r}-mg\]             Reaction is inversely proportional to the radius of the curvature of path and radius is minimum for path depicted in .


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