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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 displacement of a particle starting from rest (at \[t=0\]) is given by \[s=6{{t}^{2}}-{{t}^{3}}\]. The time in seconds at which the particle will attain zero velocity again, is        [SCRA 1998]

    A)             2         

    B)             4

    C)             6         

    D)             8

    Correct Answer: B

    Solution :

                    \[v=\frac{ds}{dt}=12t-3{{t}^{2}}\] Velocity is zero for \[t=0\] and \[t=4\sec \]


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