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JEE Main & Advanced Physics Motion in a Straight Line / सरल रेखा में गति Question Bank Non-uniform Motion

  • question_answer
    The velocity of a bullet is reduced from 200m/s to 100m/s while travelling through a wooden block of thickness 10cm. The retardation, assuming it to be uniform, will be              [AIIMS 2001]

    A)             \[10\times {{10}^{4}}\] m/s2           

    B)             \[12\times {{10}^{4}}\] m/s2

    C)             \[13.5\times {{10}^{4}}\] m/s2        

    D)             \[15\times {{10}^{4}}\] m/s2

    Correct Answer: D

    Solution :

                    \[u=200\ m/s,\ v=100\ m/s,\ s=0.1\ m\]             \[a=\frac{{{u}^{2}}-{{v}^{2}}}{2s}=\frac{{{(200)}^{2}}-{{(100)}^{2}}}{2\times 0.1}=15\times {{10}^{4}}m/{{s}^{2}}\]


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